diff --git a/server/app/modules/domestic-llm-gateway.js b/server/app/modules/domestic-llm-gateway.js
index c080148c..3ee0dd7f 100644
--- a/server/app/modules/domestic-llm-gateway.js
+++ b/server/app/modules/domestic-llm-gateway.js
@@ -28,7 +28,7 @@ const http = require('http');
 // ─── 广州CN中继配置 ───
 // 当配置了 ZY_CN_LLM_RELAY_HOST 时，请求走广州中继（国内直连·低延迟）
 // 广州不可达时降级为直连国内API（跨境·高延迟但可用）
-const CN_RELAY_HOST = process.env.ZY_CN_LLM_RELAY_HOST || '';
+const CN_RELAY_HOST = (process.env.ZY_CN_LLM_RELAY_HOST || '').trim();
 const CN_RELAY_PORT = parseInt(process.env.ZY_CN_LLM_RELAY_PORT || '3900', 10);
 const CN_RELAY_KEY = process.env.ZY_CN_LLM_RELAY_KEY || '';
 const CN_RELAY_TIMEOUT = parseInt(process.env.ZY_CN_LLM_RELAY_TIMEOUT || '30000', 10);
diff --git a/server/cn-llm-relay/relay-server.js b/server/cn-llm-relay/relay-server.js
index c9538ec9..f522f83a 100644
--- a/server/cn-llm-relay/relay-server.js
+++ b/server/cn-llm-relay/relay-server.js
@@ -203,10 +203,10 @@ app.post('/llm/chat', async (req, res) => {
   try {
     const { messages, model_id, temperature, max_tokens, fallback_order } = req.body;
 
-    if (!messages || !Array.isArray(messages)) {
+    if (!messages || !Array.isArray(messages) || messages.length === 0) {
       return res.status(400).json({
         error: true,
-        message: '缺少messages参数'
+        message: '缺少messages参数或消息列表为空'
       });
     }