diff --git a/docker-install.sh b/docker-install.sh
old mode 100755
new mode 100644
index 52d70fa..171cb89
--- a/docker-install.sh
+++ b/docker-install.sh
@@ -1,16 +1,12 @@
 # https://docs.docker.com/engine/install/debian/
 
-sudo apt-get update
-
-sudo apt-get install ca-certificates curl gnupg lsb-release -y
-
-read -p "Choose docker source (a: 阿里云, z: 中科大) >>" DOCKER_SOURCE
+read -p "Choose docker source (a: 阿里云, z: 中科大) >> " DOCKER_SOURCE
 if [ $DOCKER_SOURCE = 'a' ]
 then
   GPG_URL=http://mirrors.aliyun.com/docker-ce/linux/debian/gpg
   DOCKER_URL=http://mirrors.aliyun.com/docker-ce/linux/debian
   COMPOSE_URL=https://get.daocloud.io/docker/compose/releases/download/1.29.2/
-elif [ $DOCKER_SOURCE = 'b' ]
+elif [ $DOCKER_SOURCE = 'z' ]
 then
   GPG_URL=https://mirrors.ustc.edu.cn/docker-ce/linux/debian/gpg
   DOCKER_URL=https://mirrors.ustc.edu.cn/docker-ce/linux/debian
@@ -21,6 +17,10 @@ else
   COMPOSE_URL=https://github.com/docker/compose/releases/download/1.29.2/
 fi
 
+echo Prepare environment ...
+sudo apt-get update
+sudo apt-get install ca-certificates curl gnupg lsb-release -y
+
 echo Add Docker’s official GPG key ...
 sudo curl -fsSL $GPG_URL | sudo gpg --dearmor -o /usr/share/keyrings/docker-archive-keyring.gpg
 
@@ -34,3 +34,24 @@ sudo apt-get install docker-ce docker-ce-cli containerd.io -y
 echo Install Docker-Compose ...
 sudo curl -L $COMPOSE_URL/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
 sudo chmod +x /usr/local/bin/docker-compose
+
+read -p "配置中国加速镜像源 /etc/docker/daemon.json (d: Docker中国, t: 腾讯云, z: 中科大) >> " DOCKER_MIRROR
+if [ $DOCKER_MIRROR = 'd' ]
+then
+  DOCKER_MIRROR=https://registry.docker-cn.com
+elif [ $DOCKER_MIRROR = 't' ]
+then
+  DOCKER_MIRROR=https://mirror.ccs.tencentyun.com
+elif [ $DOCKER_MIRROR = 'z' ]
+then
+  DOCKER_MIRROR=https://docker.mirrors.ustc.edu.cn
+fi
+
+if [ $DOCKER_MIRROR ]
+then
+  echo "{" | sudo tee /etc/docker/daemon.json > /dev/null
+  echo "  \"registry-mirrors\": [" | sudo tee -a /etc/docker/daemon.json > /dev/null
+  echo "    \"$DOCKER_MIRROR\"" | sudo tee -a /etc/docker/daemon.json > /dev/null
+  echo "  ]" | sudo tee -a /etc/docker/daemon.json > /dev/null
+  echo "}" | sudo tee -a /etc/docker/daemon.json > /dev/null
+fi
\ No newline at end of file