diff --git a/cim-client-sdk/src/main/java/com/crossoverjie/cim/client/sdk/impl/ClientImpl.java b/cim-client-sdk/src/main/java/com/crossoverjie/cim/client/sdk/impl/ClientImpl.java
index 9d4571b5..5071f627 100644
--- a/cim-client-sdk/src/main/java/com/crossoverjie/cim/client/sdk/impl/ClientImpl.java
+++ b/cim-client-sdk/src/main/java/com/crossoverjie/cim/client/sdk/impl/ClientImpl.java
@@ -6,10 +6,10 @@
 import com.crossoverjie.cim.client.sdk.ReConnectManager;
 import com.crossoverjie.cim.client.sdk.RouteManager;
 import com.crossoverjie.cim.client.sdk.io.CIMClientHandleInitializer;
-import com.crossoverjie.cim.common.constant.Constants;
 import com.crossoverjie.cim.common.exception.CIMException;
 import com.crossoverjie.cim.common.kit.HeartBeatHandler;
 import com.crossoverjie.cim.common.pojo.CIMUserInfo;
+import com.crossoverjie.cim.common.protocol.BaseCommand;
 import com.crossoverjie.cim.common.protocol.Request;
 import com.crossoverjie.cim.route.api.vo.req.ChatReqVO;
 import com.crossoverjie.cim.route.api.vo.req.LoginReqVO;
@@ -82,7 +82,7 @@ public ClientImpl(ClientConfigurationData conf) {
         heartBeatPacket = Request.newBuilder()
                 .setRequestId(this.conf.getAuth().getUserId())
                 .setReqMsg("ping")
-                .setType(Constants.CommandType.PING)
+                .setCmd(BaseCommand.PING)
                 .build();
         client = this;
 
@@ -177,7 +177,7 @@ private void loginServer() {
         Request login = Request.newBuilder()
                 .setRequestId(this.conf.getAuth().getUserId())
                 .setReqMsg(this.conf.getAuth().getUserName())
-                .setType(Constants.CommandType.LOGIN)
+                .setCmd(BaseCommand.LOGIN_REQUEST)
                 .build();
         channel.writeAndFlush(login)
                 .addListener((ChannelFutureListener) channelFuture ->
diff --git a/cim-client-sdk/src/main/java/com/crossoverjie/cim/client/sdk/io/CIMClientHandle.java b/cim-client-sdk/src/main/java/com/crossoverjie/cim/client/sdk/io/CIMClientHandle.java
index 772639eb..72497ef7 100644
--- a/cim-client-sdk/src/main/java/com/crossoverjie/cim/client/sdk/io/CIMClientHandle.java
+++ b/cim-client-sdk/src/main/java/com/crossoverjie/cim/client/sdk/io/CIMClientHandle.java
@@ -2,7 +2,7 @@
 
 import com.crossoverjie.cim.client.sdk.ClientState;
 import com.crossoverjie.cim.client.sdk.impl.ClientImpl;
-import com.crossoverjie.cim.common.constant.Constants;
+import com.crossoverjie.cim.common.protocol.BaseCommand;
 import com.crossoverjie.cim.common.protocol.Response;
 import com.crossoverjie.cim.common.util.NettyAttrUtil;
 import io.netty.channel.ChannelFutureListener;
@@ -60,12 +60,12 @@ public void channelInactive(ChannelHandlerContext ctx) {
     protected void channelRead0(ChannelHandlerContext ctx, Response msg) {
 
 
-        if (msg.getType() == Constants.CommandType.PING) {
+        if (msg.getCmd() == com.crossoverjie.cim.common.protocol.BaseCommand.PING) {
             ClientImpl.getClient().getConf().getEvent().debug("received ping from server");
             NettyAttrUtil.updateReaderTime(ctx.channel(), System.currentTimeMillis());
         }
 
-        if (msg.getType() != Constants.CommandType.PING) {
+        if (msg.getCmd() != BaseCommand.PING) {
             // callback
             ClientImpl.getClient().getConf().getCallbackThreadPool().execute(() -> {
                 ClientImpl.getClient().getConf().getMessageListener().received(ClientImpl.getClient(), msg.getResMsg());
diff --git a/cim-common/src/main/java/com/crossoverjie/cim/common/constant/Constants.java b/cim-common/src/main/java/com/crossoverjie/cim/common/constant/Constants.java
index e4191eda..e034b1fe 100644
--- a/cim-common/src/main/java/com/crossoverjie/cim/common/constant/Constants.java
+++ b/cim-common/src/main/java/com/crossoverjie/cim/common/constant/Constants.java
@@ -22,24 +22,4 @@ public class Constants {
     public static final String COUNTER_CLIENT_PUSH_COUNT = "counter.client.push.count" ;
 
 
-    /**
-     * 自定义报文类型
-     */
-    public static class CommandType{
-        /**
-         * 登录
-         */
-        public static final int LOGIN = 1 ;
-        /**
-         * 业务消息
-         */
-        public static final int MSG = 2 ;
-
-        /**
-         * ping
-         */
-        public static final int PING = 3 ;
-    }
-
-
 }
diff --git a/cim-common/src/main/proto/cim.proto b/cim-common/src/main/proto/cim.proto
index 7b229cd2..bfbc5fd3 100644
--- a/cim-common/src/main/proto/cim.proto
+++ b/cim-common/src/main/proto/cim.proto
@@ -7,11 +7,17 @@ message Request{
     // todo source user info
     int64 requestId = 2;
     string reqMsg = 1;
-    int32 type = 3;
+    BaseCommand cmd = 3;
 }
 
 message Response{
     int64 responseId = 2;
     string resMsg = 1;
-    int32 type = 3;
+    BaseCommand cmd = 3;
+}
+
+enum BaseCommand{
+    LOGIN_REQUEST = 0;
+    MESSAGE = 1;
+    PING = 2;
 }
\ No newline at end of file
diff --git a/cim-common/src/test/java/com/crossoverjie/cim/common/util/ProtocolTest.java b/cim-common/src/test/java/com/crossoverjie/cim/common/util/ProtocolTest.java
index 5f87c01f..bcdd9194 100644
--- a/cim-common/src/test/java/com/crossoverjie/cim/common/util/ProtocolTest.java
+++ b/cim-common/src/test/java/com/crossoverjie/cim/common/util/ProtocolTest.java
@@ -1,5 +1,6 @@
 package com.crossoverjie.cim.common.util;
 
+import com.crossoverjie.cim.common.protocol.BaseCommand;
 import com.crossoverjie.cim.common.protocol.Request;
 import com.google.protobuf.InvalidProtocolBufferException;
 import org.junit.Test;
@@ -11,7 +12,7 @@ public void testProtocol() throws InvalidProtocolBufferException {
         Request protocol = Request.newBuilder()
                 .setRequestId(123L)
                 .setReqMsg("你好啊")
-                .setType(1)
+                .setCmd(BaseCommand.LOGIN_REQUEST)
                 .build();
 
         byte[] encode = encode(protocol);
diff --git a/cim-forward-route/src/main/java/com/crossoverjie/cim/route/service/impl/UserInfoCacheServiceImpl.java b/cim-forward-route/src/main/java/com/crossoverjie/cim/route/service/impl/UserInfoCacheServiceImpl.java
index 76a1e8b7..336afb32 100644
--- a/cim-forward-route/src/main/java/com/crossoverjie/cim/route/service/impl/UserInfoCacheServiceImpl.java
+++ b/cim-forward-route/src/main/java/com/crossoverjie/cim/route/service/impl/UserInfoCacheServiceImpl.java
@@ -41,8 +41,7 @@ public class UserInfoCacheServiceImpl implements UserInfoCacheService {
     @Override
     public Optional<CIMUserInfo> loadUserInfoByUserId(Long userId) {
         //Retrieve user information using a second-level cache.
-        Optional<CIMUserInfo> cimUserInfo = userInfoMap.getUnchecked(userId);
-        return cimUserInfo;
+        return userInfoMap.getUnchecked(userId);
     }
 
     @Override
diff --git a/cim-server/src/main/java/com/crossoverjie/cim/server/config/BeanConfig.java b/cim-server/src/main/java/com/crossoverjie/cim/server/config/BeanConfig.java
index 0acec955..f73bc49f 100644
--- a/cim-server/src/main/java/com/crossoverjie/cim/server/config/BeanConfig.java
+++ b/cim-server/src/main/java/com/crossoverjie/cim/server/config/BeanConfig.java
@@ -1,9 +1,9 @@
 package com.crossoverjie.cim.server.config;
 
-import com.crossoverjie.cim.common.constant.Constants;
 import com.crossoverjie.cim.common.core.proxy.RpcProxyManager;
 import com.crossoverjie.cim.common.metastore.MetaStore;
 import com.crossoverjie.cim.common.metastore.ZkMetaStoreImpl;
+import com.crossoverjie.cim.common.protocol.BaseCommand;
 import com.crossoverjie.cim.common.protocol.Request;
 import com.crossoverjie.cim.route.api.RouteApi;
 import jakarta.annotation.Resource;
@@ -54,7 +54,7 @@ public Request heartBeat() {
         return Request.newBuilder()
                 .setRequestId(0L)
                 .setReqMsg("pong")
-                .setType(Constants.CommandType.PING)
+                .setCmd(BaseCommand.PING)
                 .build();
     }
 
diff --git a/cim-server/src/main/java/com/crossoverjie/cim/server/handle/CIMServerHandle.java b/cim-server/src/main/java/com/crossoverjie/cim/server/handle/CIMServerHandle.java
index f8896e9c..13636af0 100644
--- a/cim-server/src/main/java/com/crossoverjie/cim/server/handle/CIMServerHandle.java
+++ b/cim-server/src/main/java/com/crossoverjie/cim/server/handle/CIMServerHandle.java
@@ -1,9 +1,9 @@
 package com.crossoverjie.cim.server.handle;
 
-import com.crossoverjie.cim.common.constant.Constants;
 import com.crossoverjie.cim.common.exception.CIMException;
 import com.crossoverjie.cim.common.kit.HeartBeatHandler;
 import com.crossoverjie.cim.common.pojo.CIMUserInfo;
+import com.crossoverjie.cim.common.protocol.BaseCommand;
 import com.crossoverjie.cim.common.protocol.Request;
 import com.crossoverjie.cim.common.util.NettyAttrUtil;
 import com.crossoverjie.cim.server.kit.RouteHandler;
@@ -74,7 +74,7 @@ public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exc
     protected void channelRead0(ChannelHandlerContext ctx, Request msg) throws Exception {
         log.info("received msg=[{}]", msg.toString());
 
-        if (msg.getType() == Constants.CommandType.LOGIN) {
+        if (msg.getCmd() == BaseCommand.LOGIN_REQUEST) {
             //保存客户端与 Channel 之间的关系
             SessionSocketHolder.put(msg.getRequestId(), (NioSocketChannel) ctx.channel());
             SessionSocketHolder.saveSession(msg.getRequestId(), msg.getReqMsg());
@@ -82,7 +82,7 @@ protected void channelRead0(ChannelHandlerContext ctx, Request msg) throws Excep
         }
 
         //心跳更新时间
-        if (msg.getType() == Constants.CommandType.PING){
+        if (msg.getCmd() == BaseCommand.PING){
             NettyAttrUtil.updateReaderTime(ctx.channel(),System.currentTimeMillis());
             //向客户端响应 pong 消息
             Request heartBeat = SpringBeanFactory.getBean("heartBeat", Request.class);
diff --git a/cim-server/src/main/java/com/crossoverjie/cim/server/server/CIMServer.java b/cim-server/src/main/java/com/crossoverjie/cim/server/server/CIMServer.java
index 6ea5848a..90e8740f 100644
--- a/cim-server/src/main/java/com/crossoverjie/cim/server/server/CIMServer.java
+++ b/cim-server/src/main/java/com/crossoverjie/cim/server/server/CIMServer.java
@@ -1,6 +1,6 @@
 package com.crossoverjie.cim.server.server;
 
-import com.crossoverjie.cim.common.constant.Constants;
+import com.crossoverjie.cim.common.protocol.BaseCommand;
 import com.crossoverjie.cim.common.protocol.Request;
 import com.crossoverjie.cim.server.api.vo.req.SendMsgReqVO;
 import com.crossoverjie.cim.server.init.CIMServerInitializer;
@@ -89,7 +89,7 @@ public void sendMsg(SendMsgReqVO sendMsgReqVO){
         Request protocol = Request.newBuilder()
                 .setRequestId(sendMsgReqVO.getUserId())
                 .setReqMsg(sendMsgReqVO.getMsg())
-                .setType(Constants.CommandType.MSG)
+                .setCmd(BaseCommand.MESSAGE)
                 .build();
 
         ChannelFuture future = socketChannel.writeAndFlush(protocol);