diff --git a/Cargo.toml b/Cargo.toml
index 4daee98..e4a85e0 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -19,7 +19,7 @@ prost = { version = "0" }
 nats = { version = "0" }
 base64 = { version = "0" }
 
-beteran-protobuf-rust = { git = "https://gitlab.loafle.net/bet/beteran-protobuf-rust.git", tag = "v0.1.40-snapshot" }
-beteran-common-rust = { git = "https://gitlab.loafle.net/bet/beteran-common-rust.git", tag = "v0.1.23-snapshot" }
+beteran-protobuf-rust = { git = "https://gitlab.loafle.net/bet/beteran-protobuf-rust.git", tag = "v0.1.42-snapshot" }
+beteran-common-rust = { git = "https://gitlab.loafle.net/bet/beteran-common-rust.git", tag = "v0.1.25-snapshot" }
 
 [build-dependencies]
diff --git a/src/main.rs b/src/main.rs
index 8950b2b..afac4f6 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,6 +2,8 @@ use std::env;
 
 mod identity;
 mod member;
+mod member_class;
+mod member_level;
 mod site;
 
 #[tokio::main]
@@ -21,6 +23,10 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
   let site_service = site::service::Service::new(connection_broker.clone(), queue_broker.clone());
   let identity_service =
     identity::service::Service::new(connection_broker.clone(), queue_broker.clone());
+  let member_class_service =
+    member_class::service::Service::new(connection_broker.clone(), queue_broker.clone());
+  let member_level_service =
+    member_level::service::Service::new(connection_broker.clone(), queue_broker.clone());
   let member_service =
     member::service::Service::new(connection_broker.clone(), queue_broker.clone());
 
@@ -29,7 +35,9 @@ async fn main() -> Result<(), Box<dyn std::error::Error>> {
   futures::try_join!(
     site_service.subscribe(),
     identity_service.subscribe(),
-    member_service.subscribe()
+    member_class_service.subscribe(),
+    member_level_service.subscribe(),
+    member_service.subscribe(),
   )?;
 
   Ok(())
diff --git a/src/member_class/mod.rs b/src/member_class/mod.rs
new file mode 100644
index 0000000..1f278a4
--- /dev/null
+++ b/src/member_class/mod.rs
@@ -0,0 +1 @@
+pub mod service;
diff --git a/src/member_class/service.rs b/src/member_class/service.rs
new file mode 100644
index 0000000..40deff8
--- /dev/null
+++ b/src/member_class/service.rs
@@ -0,0 +1,490 @@
+use beteran_common_rust as bcr;
+use beteran_protobuf_rust as bpr;
+use prost::Message;
+
+///
+pub struct Service {
+  connection_broker: nats::asynk::Connection,
+  queue_broker: String,
+}
+
+impl std::fmt::Debug for Service {
+  fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+    f.debug_struct("beteran-backend-server-edge::member_class::service::Service")
+      .finish()
+  }
+}
+
+impl Service {
+  ///
+  pub fn new(connection_broker: nats::asynk::Connection, queue_broker: String) -> Service {
+    Service {
+      connection_broker,
+      queue_broker,
+    }
+  }
+
+  pub async fn subscribe(&self) -> std::result::Result<(), std::boxed::Box<dyn std::error::Error>> {
+    futures::try_join!(
+      self.list_member_classes(),
+      self.create_member_class(),
+      self.update_member_class(),
+      self.delete_member_class(),
+    )
+    .map(|_| ())
+  }
+
+  fn get_client_in_header(
+    &self,
+    message: &nats::asynk::Message,
+  ) -> Result<bpr::models::core::network::Client, bcr::error::rpc::Error> {
+    match &message.headers {
+      Some(headers) => {
+        let client = match headers.get(bpr::c2se::core::network::HEADER_CLIENT) {
+          Some(c) => {
+            let msg = base64::decode(c).map_err(|e| {
+              bcr::error::rpc::Error::Parse(bcr::error::rpc::Parse {
+                message: format!("invalid header: {}", e),
+              })
+            })?;
+            bpr::models::core::network::Client::decode(msg.as_slice()).map_err(|e| {
+              bcr::error::rpc::Error::Parse(bcr::error::rpc::Parse {
+                message: format!("invalid header: {}", e),
+              })
+            })?
+          }
+          None => {
+            return Err(bcr::error::rpc::Error::Parse(bcr::error::rpc::Parse {
+              message: "invalid client information".to_string(),
+            }));
+          }
+        };
+
+        Ok(client)
+      }
+      None => Err(bcr::error::rpc::Error::Parse(bcr::error::rpc::Parse {
+        message: "invalid header".to_string(),
+      })),
+    }
+  }
+
+  async fn create_member_class(&self) -> Result<(), Box<dyn std::error::Error>> {
+    let s = self
+      .connection_broker
+      .queue_subscribe(
+        bpr::c2se::backend::member_class::SUBJECT_CREATE_MEMBER_CLASS,
+        self.queue_broker.as_str(),
+      )
+      .await?;
+
+    while let Some(message) = s.next().await {
+      if let Err(e) = async {
+        let client = self.get_client_in_header(&message)?;
+
+        let req = bpr::c2se::backend::member_class::CreateMemberClassRequest::decode(
+          message.data.as_slice(),
+        )
+        .map_err(|e| {
+          bcr::error::rpc::Error::InvalidRequest(bcr::error::rpc::InvalidRequest {
+            message: format!("invalid request: {}", e),
+          })
+        })?;
+
+        let ss_create_member_class_req = bpr::ss::member::member_class::CreateMemberClassRequest {
+          client: Some(client),
+          parent_id: req.parent_id,
+          name: req.name,
+        };
+
+        let ss_create_member_class_res_msg = self
+          .connection_broker
+          .request(
+            bpr::ss::member::member_class::SUBJECT_CREATE_MEMBER_CLASS,
+            ss_create_member_class_req.encode_to_vec(),
+          )
+          .await
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        let ss_create_member_class_res =
+          bpr::ss::member::member_class::CreateMemberClassResponse::decode(
+            ss_create_member_class_res_msg.data.as_slice(),
+          )
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        if let Some(e) = ss_create_member_class_res.error {
+          return Err(bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+            code: bpr::protobuf::rpc::Error::SERVER_00,
+            message: format!("server {}", e),
+            data: None,
+          }));
+        }
+
+        if let Some(r) = ss_create_member_class_res.result {
+          message
+            .respond(
+              bpr::c2se::backend::member_class::CreateMemberClassResponse {
+                error: None,
+                result: Some(
+                  bpr::c2se::backend::member_class::create_member_class_response::Result {
+                    member_class: r.member_class,
+                  },
+                ),
+              }
+              .encode_to_vec(),
+            )
+            .await
+            .map_err(|e| {
+              bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+                code: bpr::protobuf::rpc::Error::SERVER_00,
+                message: format!("server {}", e),
+                data: None,
+              })
+            })?;
+        }
+
+        Ok::<(), bcr::error::rpc::Error>(())
+      }
+      .await
+      {
+        message
+          .respond(
+            bpr::c2se::backend::member_class::CreateMemberClassResponse {
+              error: Some(bpr::protobuf::rpc::Error::from(e)),
+              result: None,
+            }
+            .encode_to_vec(),
+          )
+          .await?;
+      }
+    }
+
+    Ok(())
+  }
+
+  async fn list_member_classes(&self) -> Result<(), Box<dyn std::error::Error>> {
+    let s = self
+      .connection_broker
+      .queue_subscribe(
+        bpr::c2se::backend::member_class::SUBJECT_LIST_MEMBER_CLASSES,
+        self.queue_broker.as_str(),
+      )
+      .await?;
+
+    while let Some(message) = s.next().await {
+      if let Err(e) = async {
+        let client = self.get_client_in_header(&message)?;
+
+        let req = bpr::c2se::backend::member_class::ListMemberClassesRequest::decode(
+          message.data.as_slice(),
+        )
+        .map_err(|e| {
+          bcr::error::rpc::Error::InvalidRequest(bcr::error::rpc::InvalidRequest {
+            message: format!("invalid request: {}", e),
+          })
+        })?;
+
+        let ss_list_member_classes_req = bpr::ss::member::member_class::ListMemberClassesRequest {
+          client: Some(client),
+          pagination: req.pagination,
+          searches: req.searches,
+          sorts: req.sorts,
+          name_like: req.name_like,
+        };
+
+        let ss_list_member_classes_res_msg = self
+          .connection_broker
+          .request(
+            bpr::ss::member::member_class::SUBJECT_LIST_MEMBER_CLASSES,
+            ss_list_member_classes_req.encode_to_vec(),
+          )
+          .await
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        let ss_list_member_classes_res =
+          bpr::ss::member::member_class::ListMemberClassesResponse::decode(
+            ss_list_member_classes_res_msg.data.as_slice(),
+          )
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        if let Some(e) = ss_list_member_classes_res.error {
+          return Err(bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+            code: bpr::protobuf::rpc::Error::SERVER_00,
+            message: format!("server {}", e),
+            data: None,
+          }));
+        }
+
+        if let Some(r) = ss_list_member_classes_res.result {
+          message
+            .respond(
+              bpr::c2se::backend::member_class::ListMemberClassesResponse {
+                error: None,
+                result: Some(
+                  bpr::c2se::backend::member_class::list_member_classes_response::Result {
+                    member_classes: r.member_classes,
+                  },
+                ),
+              }
+              .encode_to_vec(),
+            )
+            .await
+            .map_err(|e| {
+              bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+                code: bpr::protobuf::rpc::Error::SERVER_00,
+                message: format!("server {}", e),
+                data: None,
+              })
+            })?;
+        }
+
+        Ok::<(), bcr::error::rpc::Error>(())
+      }
+      .await
+      {
+        message
+          .respond(
+            bpr::c2se::backend::member_class::ListMemberClassesResponse {
+              error: Some(bpr::protobuf::rpc::Error::from(e)),
+              result: None,
+            }
+            .encode_to_vec(),
+          )
+          .await?;
+      }
+    }
+
+    Ok(())
+  }
+
+  async fn update_member_class(&self) -> Result<(), Box<dyn std::error::Error>> {
+    let s = self
+      .connection_broker
+      .queue_subscribe(
+        bpr::c2se::backend::member_class::SUBJECT_UPDATE_MEMBER_CLASS,
+        self.queue_broker.as_str(),
+      )
+      .await?;
+
+    while let Some(message) = s.next().await {
+      if let Err(e) = async {
+        let client = self.get_client_in_header(&message)?;
+
+        let req = bpr::c2se::backend::member_class::UpdateMemberClassRequest::decode(
+          message.data.as_slice(),
+        )
+        .map_err(|e| {
+          bcr::error::rpc::Error::InvalidRequest(bcr::error::rpc::InvalidRequest {
+            message: format!("invalid request: {}", e),
+          })
+        })?;
+
+        let ss_update_member_class_req = bpr::ss::member::member_class::UpdateMemberClassRequest {
+          client: Some(client),
+          id: req.id,
+          parent_id: req.parent_id,
+          name: req.name,
+        };
+
+        let ss_update_member_class_res_msg = self
+          .connection_broker
+          .request(
+            bpr::ss::member::member_class::SUBJECT_UPDATE_MEMBER_CLASS,
+            ss_update_member_class_req.encode_to_vec(),
+          )
+          .await
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        let ss_update_member_class_res =
+          bpr::ss::member::member_class::UpdateMemberClassResponse::decode(
+            ss_update_member_class_res_msg.data.as_slice(),
+          )
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        if let Some(e) = ss_update_member_class_res.error {
+          return Err(bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+            code: bpr::protobuf::rpc::Error::SERVER_00,
+            message: format!("server {}", e),
+            data: None,
+          }));
+        }
+
+        if let Some(r) = ss_update_member_class_res.result {
+          message
+            .respond(
+              bpr::c2se::backend::member_class::UpdateMemberClassResponse {
+                error: None,
+                result: Some(
+                  bpr::c2se::backend::member_class::update_member_class_response::Result {
+                    member_class: r.member_class,
+                  },
+                ),
+              }
+              .encode_to_vec(),
+            )
+            .await
+            .map_err(|e| {
+              bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+                code: bpr::protobuf::rpc::Error::SERVER_00,
+                message: format!("server {}", e),
+                data: None,
+              })
+            })?;
+        }
+
+        Ok::<(), bcr::error::rpc::Error>(())
+      }
+      .await
+      {
+        message
+          .respond(
+            bpr::c2se::backend::member_class::UpdateMemberClassResponse {
+              error: Some(bpr::protobuf::rpc::Error::from(e)),
+              result: None,
+            }
+            .encode_to_vec(),
+          )
+          .await?;
+      }
+    }
+
+    Ok(())
+  }
+
+  async fn delete_member_class(&self) -> Result<(), Box<dyn std::error::Error>> {
+    let s = self
+      .connection_broker
+      .queue_subscribe(
+        bpr::c2se::backend::member_class::SUBJECT_DELETE_MEMBER_CLASS,
+        self.queue_broker.as_str(),
+      )
+      .await?;
+
+    while let Some(message) = s.next().await {
+      if let Err(e) = async {
+        let client = self.get_client_in_header(&message)?;
+
+        let req = bpr::c2se::backend::member_class::DeleteMemberClassRequest::decode(
+          message.data.as_slice(),
+        )
+        .map_err(|e| {
+          bcr::error::rpc::Error::InvalidRequest(bcr::error::rpc::InvalidRequest {
+            message: format!("invalid request: {}", e),
+          })
+        })?;
+
+        let ss_delete_member_class_req = bpr::ss::member::member_class::DeleteMemberClassRequest {
+          client: Some(client),
+          id: req.id,
+        };
+
+        let ss_delete_member_class_res_msg = self
+          .connection_broker
+          .request(
+            bpr::ss::member::member_class::SUBJECT_DELETE_MEMBER_CLASS,
+            ss_delete_member_class_req.encode_to_vec(),
+          )
+          .await
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        let ss_delete_member_class_res =
+          bpr::ss::member::member_class::DeleteMemberClassResponse::decode(
+            ss_delete_member_class_res_msg.data.as_slice(),
+          )
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        if let Some(e) = ss_delete_member_class_res.error {
+          return Err(bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+            code: bpr::protobuf::rpc::Error::SERVER_00,
+            message: format!("server {}", e),
+            data: None,
+          }));
+        }
+
+        if let Some(r) = ss_delete_member_class_res.result {
+          message
+            .respond(
+              bpr::c2se::backend::member_class::DeleteMemberClassResponse {
+                error: None,
+                result: Some(
+                  bpr::c2se::backend::member_class::delete_member_class_response::Result {},
+                ),
+              }
+              .encode_to_vec(),
+            )
+            .await
+            .map_err(|e| {
+              bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+                code: bpr::protobuf::rpc::Error::SERVER_00,
+                message: format!("server {}", e),
+                data: None,
+              })
+            })?;
+        }
+
+        Ok::<(), bcr::error::rpc::Error>(())
+      }
+      .await
+      {
+        message
+          .respond(
+            bpr::c2se::backend::member_class::DeleteMemberClassResponse {
+              error: Some(bpr::protobuf::rpc::Error::from(e)),
+              result: None,
+            }
+            .encode_to_vec(),
+          )
+          .await?;
+      }
+    }
+
+    Ok(())
+  }
+}
diff --git a/src/member_level/mod.rs b/src/member_level/mod.rs
new file mode 100644
index 0000000..1f278a4
--- /dev/null
+++ b/src/member_level/mod.rs
@@ -0,0 +1 @@
+pub mod service;
diff --git a/src/member_level/service.rs b/src/member_level/service.rs
new file mode 100644
index 0000000..0d47e44
--- /dev/null
+++ b/src/member_level/service.rs
@@ -0,0 +1,490 @@
+use beteran_common_rust as bcr;
+use beteran_protobuf_rust as bpr;
+use prost::Message;
+
+///
+pub struct Service {
+  connection_broker: nats::asynk::Connection,
+  queue_broker: String,
+}
+
+impl std::fmt::Debug for Service {
+  fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+    f.debug_struct("beteran-backend-server-edge::member_level::service::Service")
+      .finish()
+  }
+}
+
+impl Service {
+  ///
+  pub fn new(connection_broker: nats::asynk::Connection, queue_broker: String) -> Service {
+    Service {
+      connection_broker,
+      queue_broker,
+    }
+  }
+
+  pub async fn subscribe(&self) -> std::result::Result<(), std::boxed::Box<dyn std::error::Error>> {
+    futures::try_join!(
+      self.list_member_levels(),
+      self.create_member_level(),
+      self.update_member_level(),
+      self.delete_member_level(),
+    )
+    .map(|_| ())
+  }
+
+  fn get_client_in_header(
+    &self,
+    message: &nats::asynk::Message,
+  ) -> Result<bpr::models::core::network::Client, bcr::error::rpc::Error> {
+    match &message.headers {
+      Some(headers) => {
+        let client = match headers.get(bpr::c2se::core::network::HEADER_CLIENT) {
+          Some(c) => {
+            let msg = base64::decode(c).map_err(|e| {
+              bcr::error::rpc::Error::Parse(bcr::error::rpc::Parse {
+                message: format!("invalid header: {}", e),
+              })
+            })?;
+            bpr::models::core::network::Client::decode(msg.as_slice()).map_err(|e| {
+              bcr::error::rpc::Error::Parse(bcr::error::rpc::Parse {
+                message: format!("invalid header: {}", e),
+              })
+            })?
+          }
+          None => {
+            return Err(bcr::error::rpc::Error::Parse(bcr::error::rpc::Parse {
+              message: "invalid client information".to_string(),
+            }));
+          }
+        };
+
+        Ok(client)
+      }
+      None => Err(bcr::error::rpc::Error::Parse(bcr::error::rpc::Parse {
+        message: "invalid header".to_string(),
+      })),
+    }
+  }
+
+  async fn create_member_level(&self) -> Result<(), Box<dyn std::error::Error>> {
+    let s = self
+      .connection_broker
+      .queue_subscribe(
+        bpr::c2se::backend::member_level::SUBJECT_CREATE_MEMBER_LEVEL,
+        self.queue_broker.as_str(),
+      )
+      .await?;
+
+    while let Some(message) = s.next().await {
+      if let Err(e) = async {
+        let client = self.get_client_in_header(&message)?;
+
+        let req = bpr::c2se::backend::member_level::CreateMemberLevelRequest::decode(
+          message.data.as_slice(),
+        )
+        .map_err(|e| {
+          bcr::error::rpc::Error::InvalidRequest(bcr::error::rpc::InvalidRequest {
+            message: format!("invalid request: {}", e),
+          })
+        })?;
+
+        let ss_create_member_level_req = bpr::ss::member::member_level::CreateMemberLevelRequest {
+          client: Some(client),
+          name: req.name,
+          sort_order: req.sort_order,
+        };
+
+        let ss_create_member_level_res_msg = self
+          .connection_broker
+          .request(
+            bpr::ss::member::member_level::SUBJECT_CREATE_MEMBER_LEVEL,
+            ss_create_member_level_req.encode_to_vec(),
+          )
+          .await
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        let ss_create_member_level_res =
+          bpr::ss::member::member_level::CreateMemberLevelResponse::decode(
+            ss_create_member_level_res_msg.data.as_slice(),
+          )
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        if let Some(e) = ss_create_member_level_res.error {
+          return Err(bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+            code: bpr::protobuf::rpc::Error::SERVER_00,
+            message: format!("server {}", e),
+            data: None,
+          }));
+        }
+
+        if let Some(r) = ss_create_member_level_res.result {
+          message
+            .respond(
+              bpr::c2se::backend::member_level::CreateMemberLevelResponse {
+                error: None,
+                result: Some(
+                  bpr::c2se::backend::member_level::create_member_level_response::Result {
+                    member_level: r.member_level,
+                  },
+                ),
+              }
+              .encode_to_vec(),
+            )
+            .await
+            .map_err(|e| {
+              bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+                code: bpr::protobuf::rpc::Error::SERVER_00,
+                message: format!("server {}", e),
+                data: None,
+              })
+            })?;
+        }
+
+        Ok::<(), bcr::error::rpc::Error>(())
+      }
+      .await
+      {
+        message
+          .respond(
+            bpr::c2se::backend::member_level::CreateMemberLevelResponse {
+              error: Some(bpr::protobuf::rpc::Error::from(e)),
+              result: None,
+            }
+            .encode_to_vec(),
+          )
+          .await?;
+      }
+    }
+
+    Ok(())
+  }
+
+  async fn list_member_levels(&self) -> Result<(), Box<dyn std::error::Error>> {
+    let s = self
+      .connection_broker
+      .queue_subscribe(
+        bpr::c2se::backend::member_level::SUBJECT_LIST_MEMBER_LEVELS,
+        self.queue_broker.as_str(),
+      )
+      .await?;
+
+    while let Some(message) = s.next().await {
+      if let Err(e) = async {
+        let client = self.get_client_in_header(&message)?;
+
+        let req = bpr::c2se::backend::member_level::ListMemberLevelsRequest::decode(
+          message.data.as_slice(),
+        )
+        .map_err(|e| {
+          bcr::error::rpc::Error::InvalidRequest(bcr::error::rpc::InvalidRequest {
+            message: format!("invalid request: {}", e),
+          })
+        })?;
+
+        let ss_list_member_levels_req = bpr::ss::member::member_level::ListMemberLevelsRequest {
+          client: Some(client),
+          pagination: req.pagination,
+          searches: req.searches,
+          sorts: req.sorts,
+          name_like: req.name_like,
+        };
+
+        let ss_list_member_levels_res_msg = self
+          .connection_broker
+          .request(
+            bpr::ss::member::member_level::SUBJECT_LIST_MEMBER_LEVELS,
+            ss_list_member_levels_req.encode_to_vec(),
+          )
+          .await
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        let ss_list_member_levels_res =
+          bpr::ss::member::member_level::ListMemberLevelsResponse::decode(
+            ss_list_member_levels_res_msg.data.as_slice(),
+          )
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        if let Some(e) = ss_list_member_levels_res.error {
+          return Err(bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+            code: bpr::protobuf::rpc::Error::SERVER_00,
+            message: format!("server {}", e),
+            data: None,
+          }));
+        }
+
+        if let Some(r) = ss_list_member_levels_res.result {
+          message
+            .respond(
+              bpr::c2se::backend::member_level::ListMemberLevelsResponse {
+                error: None,
+                result: Some(
+                  bpr::c2se::backend::member_level::list_member_levels_response::Result {
+                    member_levels: r.member_levels,
+                  },
+                ),
+              }
+              .encode_to_vec(),
+            )
+            .await
+            .map_err(|e| {
+              bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+                code: bpr::protobuf::rpc::Error::SERVER_00,
+                message: format!("server {}", e),
+                data: None,
+              })
+            })?;
+        }
+
+        Ok::<(), bcr::error::rpc::Error>(())
+      }
+      .await
+      {
+        message
+          .respond(
+            bpr::c2se::backend::member_level::ListMemberLevelsResponse {
+              error: Some(bpr::protobuf::rpc::Error::from(e)),
+              result: None,
+            }
+            .encode_to_vec(),
+          )
+          .await?;
+      }
+    }
+
+    Ok(())
+  }
+
+  async fn update_member_level(&self) -> Result<(), Box<dyn std::error::Error>> {
+    let s = self
+      .connection_broker
+      .queue_subscribe(
+        bpr::c2se::backend::member_level::SUBJECT_UPDATE_MEMBER_LEVEL,
+        self.queue_broker.as_str(),
+      )
+      .await?;
+
+    while let Some(message) = s.next().await {
+      if let Err(e) = async {
+        let client = self.get_client_in_header(&message)?;
+
+        let req = bpr::c2se::backend::member_level::UpdateMemberLevelRequest::decode(
+          message.data.as_slice(),
+        )
+        .map_err(|e| {
+          bcr::error::rpc::Error::InvalidRequest(bcr::error::rpc::InvalidRequest {
+            message: format!("invalid request: {}", e),
+          })
+        })?;
+
+        let ss_update_member_level_req = bpr::ss::member::member_level::UpdateMemberLevelRequest {
+          client: Some(client),
+          id: req.id,
+          parent_id: req.parent_id,
+          name: req.name,
+        };
+
+        let ss_update_member_level_res_msg = self
+          .connection_broker
+          .request(
+            bpr::ss::member::member_level::SUBJECT_UPDATE_MEMBER_LEVEL,
+            ss_update_member_level_req.encode_to_vec(),
+          )
+          .await
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        let ss_update_member_level_res =
+          bpr::ss::member::member_level::UpdateMemberLevelResponse::decode(
+            ss_update_member_level_res_msg.data.as_slice(),
+          )
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        if let Some(e) = ss_update_member_level_res.error {
+          return Err(bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+            code: bpr::protobuf::rpc::Error::SERVER_00,
+            message: format!("server {}", e),
+            data: None,
+          }));
+        }
+
+        if let Some(r) = ss_update_member_level_res.result {
+          message
+            .respond(
+              bpr::c2se::backend::member_level::UpdateMemberLevelResponse {
+                error: None,
+                result: Some(
+                  bpr::c2se::backend::member_level::update_member_level_response::Result {
+                    member_level: r.member_level,
+                  },
+                ),
+              }
+              .encode_to_vec(),
+            )
+            .await
+            .map_err(|e| {
+              bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+                code: bpr::protobuf::rpc::Error::SERVER_00,
+                message: format!("server {}", e),
+                data: None,
+              })
+            })?;
+        }
+
+        Ok::<(), bcr::error::rpc::Error>(())
+      }
+      .await
+      {
+        message
+          .respond(
+            bpr::c2se::backend::member_level::UpdateMemberLevelResponse {
+              error: Some(bpr::protobuf::rpc::Error::from(e)),
+              result: None,
+            }
+            .encode_to_vec(),
+          )
+          .await?;
+      }
+    }
+
+    Ok(())
+  }
+
+  async fn delete_member_level(&self) -> Result<(), Box<dyn std::error::Error>> {
+    let s = self
+      .connection_broker
+      .queue_subscribe(
+        bpr::c2se::backend::member_level::SUBJECT_DELETE_MEMBER_LEVEL,
+        self.queue_broker.as_str(),
+      )
+      .await?;
+
+    while let Some(message) = s.next().await {
+      if let Err(e) = async {
+        let client = self.get_client_in_header(&message)?;
+
+        let req = bpr::c2se::backend::member_level::DeleteMemberLevelRequest::decode(
+          message.data.as_slice(),
+        )
+        .map_err(|e| {
+          bcr::error::rpc::Error::InvalidRequest(bcr::error::rpc::InvalidRequest {
+            message: format!("invalid request: {}", e),
+          })
+        })?;
+
+        let ss_delete_member_level_req = bpr::ss::member::member_level::DeleteMemberLevelRequest {
+          client: Some(client),
+          id: req.id,
+        };
+
+        let ss_delete_member_level_res_msg = self
+          .connection_broker
+          .request(
+            bpr::ss::member::member_level::SUBJECT_DELETE_MEMBER_LEVEL,
+            ss_delete_member_level_req.encode_to_vec(),
+          )
+          .await
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        let ss_delete_member_level_res =
+          bpr::ss::member::member_level::DeleteMemberLevelResponse::decode(
+            ss_delete_member_level_res_msg.data.as_slice(),
+          )
+          .map_err(|e| {
+            bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+              code: bpr::protobuf::rpc::Error::SERVER_00,
+              message: format!("server {}", e),
+              data: None,
+            })
+          })?;
+
+        if let Some(e) = ss_delete_member_level_res.error {
+          return Err(bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+            code: bpr::protobuf::rpc::Error::SERVER_00,
+            message: format!("server {}", e),
+            data: None,
+          }));
+        }
+
+        if let Some(r) = ss_delete_member_level_res.result {
+          message
+            .respond(
+              bpr::c2se::backend::member_level::DeleteMemberLevelResponse {
+                error: None,
+                result: Some(
+                  bpr::c2se::backend::member_level::delete_member_level_response::Result {},
+                ),
+              }
+              .encode_to_vec(),
+            )
+            .await
+            .map_err(|e| {
+              bcr::error::rpc::Error::Server(bcr::error::rpc::Server {
+                code: bpr::protobuf::rpc::Error::SERVER_00,
+                message: format!("server {}", e),
+                data: None,
+              })
+            })?;
+        }
+
+        Ok::<(), bcr::error::rpc::Error>(())
+      }
+      .await
+      {
+        message
+          .respond(
+            bpr::c2se::backend::member_level::DeleteMemberLevelResponse {
+              error: Some(bpr::protobuf::rpc::Error::from(e)),
+              result: None,
+            }
+            .encode_to_vec(),
+          )
+          .await?;
+      }
+    }
+
+    Ok(())
+  }
+}