diff --git a/choose-cn.sh b/choose-cn.sh
deleted file mode 100644
index 4c9f733..0000000
--- a/choose-cn.sh
+++ /dev/null
@@ -1,62 +0,0 @@
-#!/bin/bash
-
-# 使用 dig 命令查询 DNS 记录并写入 ip.txt
-dig cf.youoffer.net A +short > ip.txt
-
-# 创建一个新的文件 ip_use.txt
-touch ip_use.txt
-
-# 读取 ip.txt 中的每个 IP 地址
-while IFS= read -r ip
-do
-    # 使用 ping 命令检查延迟
-    ping_result=$(ping -c 1 -W 1 "$ip" | grep ttl)
-  
-    # 如果 ping 成功
-    if [ $? -eq 0 ]; then
-        # 提取延迟时间
-        ping_time=$(echo "$ping_result" | cut -d'=' -f 4 | cut -d' ' -f 1)
-    
-        # 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
-        else
-            echo "Ping to $ip discarded due to high latency of $ping_time ms"
-        fi
-    else
-        echo "Ping to $ip failed"
-    fi
-done < ip.txt
-
-# 读取 ip_use.txt 中的每个 IP 地址进行下载测试
-while IFS= read -r ip
-do
-    echo "Starting download test for $ip"
-    # 使用 curl 命令进行下载测试
-    start_time=$(date +%s.%N)
-    curl -s --resolve speed.cloudflare.com:443:"$ip" https://speed.cloudflare.com/__down?bytes=10000000 -o /dev/null --connect-timeout 5 --max-time 10
-    curl_status=$?
-    end_time=$(date +%s.%N)
-    elapsed_time=$(echo "$end_time - $start_time" | bc)
-    
-    # 检查 curl 命令的返回状态
-    if [ $curl_status -eq 0 ]; then
-        # 计算下载速度
-        download_speed=$(echo "scale=2; (10000000*8)/(($elapsed_time)*1000000)" | bc)
-        
-        # 如果下载速度小于 50Mbps
-        if (( $(echo "$download_speed < 50" | bc -l) )); then
-            # 从 ip_use.txt 删除下载速度小于 50Mbps 的 IP
-            sed -i "/$ip/d" ip_use.txt
-        else
-            echo "$ip has a download speed of $download_speed Mbps"
-        fi
-    else
-        echo "Download test for $ip failed with status $curl_status"
-        # 从 ip_use.txt 删除下载测试失败的 IP
-        sed -i "/$ip/d" ip_use.txt
-    fi
-    echo "Finished download test for $ip"
-done < ip_use.txt