diff --git a/choose-cn.sh b/choose-cn.sh
index 0319150..21d8c08 100644
--- a/choose-cn.sh
+++ b/choose-cn.sh
@@ -19,9 +19,17 @@ do
     
         # 如果延迟时间小于 150ms
         if (( $(echo "$ping_time < 150" | bc -l) )); then
-            echo "Ping to $ip successful with a latency of $ping_time ms"
-            # 将小于 150ms 的 IP 写入 ip_use.txt
-            echo "$ip" >> ip_use.txt
+            # 检查 IP 地址与 Cloudflare 的连通性
+            status_code=$(curl --resolve cloudflare.com:443:$ip --insecure https://cloudflare.com/cdn-cgi/trace -o /dev/null -w '%{http_code}' -s)
+            
+            # 如果 HTTP 状态码为 200
+            if [ $status_code -eq 200 ]; then
+                echo "Ping to $ip successful with a latency of $ping_time ms"
+                # 将小于 150ms 的 IP 写入 ip_use.txt
+                echo "$ip" >> ip_use.txt
+            else
+                echo "Ping to $ip discarded due to connectivity issues with Cloudflare"
+            fi
         else
             echo "Ping to $ip discarded due to high latency of $ping_time ms"
         fi