diff --git a/choose-cn-v2.sh b/choose-cn-v2.sh
index 9f25f22..63449c9 100644
--- a/choose-cn-v2.sh
+++ b/choose-cn-v2.sh
@@ -83,6 +83,46 @@ done < ip.txt
 
 echo "Download tests completed. IPs with download speed >= 8Mbps are written to final_ips.txt"
 
+# WebSocket 检测部分
+IP_USE_FILE="ip_use.txt"
+touch "$IP_USE_FILE"
+
+# 读取 final_ips.txt 文件中的每个 IP 地址，并进行 WebSocket 测试
+while IFS= read -r IP_ADDRESS; do
+    # 忽略空行
+    if [[ -z "$IP_ADDRESS" ]]; then
+        continue
+    fi
+
+    echo "Testing WebSocket connection for IP address: $IP_ADDRESS"
+
+    # 使用 curl 测试 WebSocket 连接
+    HTTP_RESPONSE=$(curl --include \
+        --no-buffer \
+        --max-time 5 \
+        --resolve speed.cloudflare.com:443:"$IP_ADDRESS" \
+        --header "Connection: Upgrade" \
+        --header "Upgrade: websocket" \
+        --header "Host: speed.cloudflare.com" \
+        --header "Origin: https://speed.cloudflare.com" \
+        --header "Sec-WebSocket-Key: SGVsbG8sIHdvcmxkIQ==" \
+        --header "Sec-WebSocket-Version: 13" \
+        "https://speed.cloudflare.com/" --silent --output /dev/null --write-out "%{http_code}")
+
+    # 检查 HTTP 响应码
+    if [[ "$HTTP_RESPONSE" == "101" ]]; then
+        echo "$IP_ADDRESS" >> "$IP_USE_FILE"
+        echo "WebSocket connection success: HTTP 101 Switching Protocols"
+    else
+        echo "WebSocket connection failed: HTTP response was $HTTP_RESPONSE or connection timed out"
+        # 从 final_ips.txt 删除无法建立 WebSocket 连接的 IP
+        sed -i "/$IP_ADDRESS/d" final_ips.txt
+    fi
+done < final_ips.txt
+
+echo "WebSocket tests completed. IPs with successful WebSocket connections are written to $IP_USE_FILE"
+
+
 # Cloudflare DDNS 更新部分
 # 以下变量需要填写
 API_KEY="your_cloudflare_global_api_key"
@@ -132,7 +172,7 @@ do
     else
         echo "Failed to add DNS record for IP $ip"
     fi
-done < final_ips.txt
+done < ip_use.txt
 # 删除临时文件
-rm -rf ip.txt final_ips.txt
+rm -rf ip.txt final_ips.txt ip_use.txt