diff --git a/README.md b/README.md
index 96d6d9ee9..537be4061 100644
--- a/README.md
+++ b/README.md
@@ -79,4 +79,4 @@ Please follow SuperSonic wechat official account:
 
 Welcome to join the WeChat community:
 
-<img src="./docs/images/supersonic_wechat.jpg" height="50%" width="50%" align="center"/> 
\ No newline at end of file
+<img src="./docs/images/supersonic_wechat.png" height="50%" width="50%" align="center"/> 
\ No newline at end of file
diff --git a/README_CN.md b/README_CN.md
index efa27a95c..3f954eb56 100644
--- a/README_CN.md
+++ b/README_CN.md
@@ -77,4 +77,4 @@ SuperSonic自带样例的语义模型和问答对话，只需以下三步即可
 
 欢迎加入微信社群：
 
-<img src="./docs/images/supersonic_wechat.jpg" height="50%" width="50%" align="center"/> 
\ No newline at end of file
+<img src="./docs/images/supersonic_wechat.png" height="50%" width="50%" align="center"/> 
\ No newline at end of file
diff --git a/chat/server/src/main/java/com/tencent/supersonic/chat/server/rest/AgentController.java b/chat/server/src/main/java/com/tencent/supersonic/chat/server/rest/AgentController.java
index 0081c11a1..5119a2925 100644
--- a/chat/server/src/main/java/com/tencent/supersonic/chat/server/rest/AgentController.java
+++ b/chat/server/src/main/java/com/tencent/supersonic/chat/server/rest/AgentController.java
@@ -5,6 +5,8 @@ import com.tencent.supersonic.auth.api.authentication.utils.UserHolder;
 import com.tencent.supersonic.chat.server.agent.Agent;
 import com.tencent.supersonic.chat.server.agent.AgentToolType;
 import com.tencent.supersonic.chat.server.service.AgentService;
+import com.tencent.supersonic.chat.server.util.LLMConnHelper;
+import com.tencent.supersonic.common.config.LLMConfig;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.DeleteMapping;
 import org.springframework.web.bind.annotation.PathVariable;
@@ -49,6 +51,11 @@ public class AgentController {
         return true;
     }
 
+    @PostMapping("/testLLMConn")
+    public boolean testLLMConn(@RequestBody LLMConfig llmConfig) {
+        return LLMConnHelper.testConnection(llmConfig);
+    }
+
     @RequestMapping("/getAgentList")
     public List<Agent> getAgentList() {
         return agentService.getAgents();
diff --git a/chat/server/src/main/java/com/tencent/supersonic/chat/server/service/ConfigService.java b/chat/server/src/main/java/com/tencent/supersonic/chat/server/service/ConfigService.java
index 7039a72ae..21bb6ba91 100644
--- a/chat/server/src/main/java/com/tencent/supersonic/chat/server/service/ConfigService.java
+++ b/chat/server/src/main/java/com/tencent/supersonic/chat/server/service/ConfigService.java
@@ -11,7 +11,6 @@ import com.tencent.supersonic.chat.api.pojo.response.ChatConfigRichResp;
 import com.tencent.supersonic.chat.server.config.ChatConfig;
 
 import java.util.List;
-import java.util.Map;
 
 public interface ConfigService {
 
@@ -21,8 +20,6 @@ public interface ConfigService {
 
     ItemNameVisibilityInfo getItemNameVisibility(ChatConfig chatConfig);
 
-    ItemNameVisibilityInfo getVisibilityByModelId(Long modelId);
-
     List<ChatConfigResp> search(ChatConfigFilter filter, User user);
 
     ChatConfigRichResp getConfigRichInfo(Long modelId);
@@ -31,5 +28,4 @@ public interface ConfigService {
 
     List<ChatConfigRichResp> getAllChatRichConfig();
 
-    Map<Long, ChatConfigRichResp> getModelIdToChatRichConfig();
 }
diff --git a/chat/server/src/main/java/com/tencent/supersonic/chat/server/service/impl/ConfigServiceImpl.java b/chat/server/src/main/java/com/tencent/supersonic/chat/server/service/impl/ConfigServiceImpl.java
index fd40f8495..63a004d10 100644
--- a/chat/server/src/main/java/com/tencent/supersonic/chat/server/service/impl/ConfigServiceImpl.java
+++ b/chat/server/src/main/java/com/tencent/supersonic/chat/server/service/impl/ConfigServiceImpl.java
@@ -342,11 +342,4 @@ public class ConfigServiceImpl implements ConfigService {
         return new ArrayList<>();
     }
 
-    @Override
-    public Map<Long, ChatConfigRichResp> getModelIdToChatRichConfig() {
-        List<ChatConfigRichResp> allChatRichConfig = getAllChatRichConfig();
-        return allChatRichConfig.stream()
-                .collect(Collectors.toMap(ChatConfigRichResp::getModelId, value -> value, (k1, k2) -> k1));
-    }
-
 }
diff --git a/chat/server/src/main/java/com/tencent/supersonic/chat/server/util/LLMConnHelper.java b/chat/server/src/main/java/com/tencent/supersonic/chat/server/util/LLMConnHelper.java
new file mode 100644
index 000000000..a013c857d
--- /dev/null
+++ b/chat/server/src/main/java/com/tencent/supersonic/chat/server/util/LLMConnHelper.java
@@ -0,0 +1,18 @@
+package com.tencent.supersonic.chat.server.util;
+
+import com.tencent.supersonic.common.config.LLMConfig;
+import com.tencent.supersonic.common.util.S2ChatModelProvider;
+import dev.langchain4j.model.chat.ChatLanguageModel;
+import org.apache.commons.lang3.StringUtils;
+
+public class LLMConnHelper {
+    public static boolean testConnection(LLMConfig llmConfig) {
+        try {
+            ChatLanguageModel chatLanguageModel = S2ChatModelProvider.provide(llmConfig);
+            String response = chatLanguageModel.generate("Hi there");
+            return StringUtils.isNotEmpty(response) ? true : false;
+        } catch (Exception e) {
+            return false;
+        }
+    }
+}
diff --git a/docs/images/supersonic_wechat.jpg b/docs/images/supersonic_wechat.jpg
deleted file mode 100644
index fb3ff44fd..000000000
Binary files a/docs/images/supersonic_wechat.jpg and /dev/null differ
diff --git a/docs/images/supersonic_wechat.png b/docs/images/supersonic_wechat.png
index 3a99c466a..86c8fd372 100644
Binary files a/docs/images/supersonic_wechat.png and b/docs/images/supersonic_wechat.png differ