diff --git a/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServer.java b/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServer.java
index 289dfa0f..345f5cfa 100644
--- a/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServer.java
+++ b/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServer.java
@@ -4,9 +4,9 @@
 import java.util.Map;
 
 /**
- * 连接服务
+ * 连接服务。
  * <p>
- * 表示服务实例信息
+ * A server can be connect.
  */
 public interface ConnectionServer {
 
@@ -17,59 +17,19 @@ static String url(ConnectionServer server) {
         return server.getHost() + ":" + server.getPort();
     }
 
-    /**
-     * 获得服务实例 id
-     *
-     * @return 服务实例 id
-     */
     String getInstanceId();
 
-    /**
-     * 获得服务 id
-     *
-     * @return 服务 id
-     */
     String getServiceId();
 
-    /**
-     * 获得 host
-     *
-     * @return host
-     */
     String getHost();
 
-    /**
-     * 获得 port
-     *
-     * @return port
-     */
     int getPort();
 
-    /**
-     * 获得元数据
-     *
-     * @return 元数据
-     */
     Map<String, String> getMetadata();
 
-    /**
-     * 获得 {@link URI}
-     *
-     * @return {@link URI}
-     */
     URI getUri();
 
-    /**
-     * 获得 Scheme
-     *
-     * @return Scheme
-     */
     String getScheme();
 
-    /**
-     * 是否安全的
-     *
-     * @return 是否安全的
-     */
     boolean isSecure();
 }
diff --git a/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServerImpl.java b/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServerImpl.java
index ad37eb30..43de341b 100644
--- a/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServerImpl.java
+++ b/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServerImpl.java
@@ -6,7 +6,9 @@
 import java.util.Map;
 
 /**
- * {@link ConnectionServer} 的默认实现
+ * {@link ConnectionServer} 的默认实现。
+ * <p>
+ * Default impl of {@link ConnectionServer}.
  */
 @Data
 public class ConnectionServerImpl implements ConnectionServer {
diff --git a/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServerManager.java b/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServerManager.java
index 971279c1..a9fd5c57 100644
--- a/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServerManager.java
+++ b/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServerManager.java
@@ -7,54 +7,121 @@
 import java.util.List;
 
 /**
- * {@link ConnectionServer} 提供者
+ * 连接服务管理器。
+ * <p>
+ * Management of connectable server.
  */
 public interface ConnectionServerManager {
 
+    /**
+     * 添加服务。
+     * <p>
+     * Add a server.
+     */
     default void add(ConnectionServer server, ConnectionLoadBalanceConcept concept) {
         throw new UnsupportedOperationException();
     }
 
+    /**
+     * 添加服务。
+     * <p>
+     * Add a server.
+     */
     default void add(ConnectionServer server) {
         add(server, null);
     }
 
+    /**
+     * 移除服务。
+     * <p>
+     * Remove a server.
+     */
     default void remove(ConnectionServer server, ConnectionLoadBalanceConcept concept) {
         throw new UnsupportedOperationException();
     }
 
+    /**
+     * 移除服务。
+     * <p>
+     * Remove a server.
+     */
     default void remove(ConnectionServer server) {
         remove(server, null);
     }
 
+    /**
+     * 清空服务。
+     * <p>
+     * Clear servers.
+     */
     default void clear(ConnectionLoadBalanceConcept concept) {
         throw new UnsupportedOperationException();
     }
 
+    /**
+     * 清空服务。
+     * <p>
+     * Clear servers.
+     */
     default void clear() {
         clear(null);
     }
 
+    /**
+     * 比较两个服务是否相等。
+     * <p>
+     * Compare whether two services are equal.
+     */
     default boolean isEqual(ConnectionServer server1, ConnectionServer server2, ConnectionLoadBalanceConcept concept) {
         return server1.getHost().equals(server2.getHost()) && server1.getPort() == server2.getPort();
     }
 
+    /**
+     * 比较两个服务是否相等。
+     * <p>
+     * Compare whether two services are equal.
+     */
     default boolean isEqual(ConnectionServer server1, ConnectionServer server2) {
         return isEqual(server1, server2, null);
     }
 
+    /**
+     * 获得本地服务。
+     * <p>
+     * Get local server.
+     */
     ConnectionServer getLocal(ConnectionLoadBalanceConcept concept);
 
+    /**
+     * 获得本地服务。
+     * <p>
+     * Get local server.
+     */
     default ConnectionServer getLocal() {
         return getLocal(null);
     }
 
+    /**
+     * 获得需要连接的服务。
+     * <p>
+     * Get servers need connect.
+     */
     List<ConnectionServer> getConnectionServers(ConnectionLoadBalanceConcept concept);
 
+    /**
+     * 获得需要连接的服务。
+     * <p>
+     * Get servers need connect.
+     */
     default List<ConnectionServer> getConnectionServers() {
         return getConnectionServers(null);
     }
 
+    /**
+     * 连接服务管理器代理。
+     * <p>
+     * Delegate of server manager.
+     */
     @Getter
     @RequiredArgsConstructor
     class Delegate implements ConnectionServerManager {
@@ -64,7 +131,7 @@ class Delegate implements ConnectionServerManager {
         private final ConnectionServerManager delegate;
 
         public static ConnectionServerManager delegate(ConnectionLoadBalanceConcept concept,
-                                        ConnectionServerManager delegate) {
+                                                       ConnectionServerManager delegate) {
             return new Delegate(concept, delegate);
         }
 
diff --git a/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServerManagerFactory.java b/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServerManagerFactory.java
index d9bd30cf..097b84bb 100644
--- a/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServerManagerFactory.java
+++ b/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/ConnectionServerManagerFactory.java
@@ -2,6 +2,11 @@
 
 import com.github.linyuzai.connection.loadbalance.core.scope.ScopedFactory;
 
+/**
+ * 连接管理器工厂。
+ * <p>
+ * Factory of server manager.
+ */
 public interface ConnectionServerManagerFactory extends ScopedFactory<ConnectionServerManager> {
 
 }
diff --git a/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/SimpleConnectionServerManager.java b/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/SimpleConnectionServerManager.java
index 8a180c42..a7246069 100644
--- a/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/SimpleConnectionServerManager.java
+++ b/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/SimpleConnectionServerManager.java
@@ -7,7 +7,9 @@
 import java.util.concurrent.CopyOnWriteArrayList;
 
 /**
- * {@link ConnectionServer} 提供者默认实现
+ * 连接服务管理器简单实现。
+ * <p>
+ * Simple impl of server manager.
  */
 public class SimpleConnectionServerManager implements ConnectionServerManager {
 
diff --git a/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/SimpleConnectionServerManagerFactory.java b/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/SimpleConnectionServerManagerFactory.java
index 1deb6c41..2dfb34a7 100644
--- a/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/SimpleConnectionServerManagerFactory.java
+++ b/concept-connection-loadbalance/concept-connection-loadbalance-core/src/main/java/com/github/linyuzai/connection/loadbalance/core/server/SimpleConnectionServerManagerFactory.java
@@ -1,5 +1,10 @@
 package com.github.linyuzai.connection.loadbalance.core.server;
 
+/**
+ * {@link SimpleConnectionServerManager} 工厂。
+ * <p>
+ * Factory of {@link SimpleConnectionServerManager}.
+ */
 public class SimpleConnectionServerManagerFactory implements ConnectionServerManagerFactory {
 
     @Override