diff --git a/choose-cn.sh b/choose-cn.sh
index ecfebc9..4c9f733 100644
--- a/choose-cn.sh
+++ b/choose-cn.sh
@@ -44,7 +44,7 @@ do
     # 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)/(($elapsed_time)*100000)" | bc)
+        download_speed=$(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