diff --git a/Dockerfile b/Dockerfile
index c6bd0d358..3e2bcc2ba 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
-FROM ubuntu:22.04
+FROM ubuntu:20.04
 
-ADD docker/sources.list /etc/apt/sources.list
+ADD docker/ubuntu20_sources.list /etc/apt/sources.list
 
 RUN echo 'Asia/Shanghai' >/etc/timezone
 
diff --git a/docker/sources.list b/docker/sources.list
deleted file mode 100644
index aabc0906b..000000000
--- a/docker/sources.list
+++ /dev/null
@@ -1,16 +0,0 @@
-# 默认注释了源码镜像以提高 apt update 速度，如有需要可自行取消注释
-deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiverse
-# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy main restricted universe multiverse
-deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
-# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-updates main restricted universe multiverse
-deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse
-# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-backports main restricted universe multiverse
-deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-security main restricted universe multiverse
-# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-security main restricted universe multiverse
-
-# 预发布软件源，不建议启用
-# deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse
-# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ jammy-proposed main restricted universe multiverse
-
-
-deb https://repo.huaweicloud.com/ubuntu/ jammy main universe restricted multiverse
diff --git a/docker/ubuntu20_sources.list b/docker/ubuntu20_sources.list
new file mode 100644
index 000000000..79a612abe
--- /dev/null
+++ b/docker/ubuntu20_sources.list
@@ -0,0 +1,10 @@
+deb http://mirrors.cloud.tencent.com/ubuntu/ focal main restricted universe multiverse
+deb http://mirrors.cloud.tencent.com/ubuntu/ focal-security main restricted universe multiverse
+deb http://mirrors.cloud.tencent.com/ubuntu/ focal-updates main restricted universe multiverse
+#deb http://mirrors.cloud.tencent.com/ubuntu/ focal-proposed main restricted universe multiverse
+#deb http://mirrors.cloud.tencent.com/ubuntu/ focal-backports main restricted universe multiverse
+deb-src http://mirrors.cloud.tencent.com/ubuntu/ focal main restricted universe multiverse
+deb-src http://mirrors.cloud.tencent.com/ubuntu/ focal-security main restricted universe multiverse
+deb-src http://mirrors.cloud.tencent.com/ubuntu/ focal-updates main restricted universe multiverse
+#deb-src http://mirrors.cloud.tencent.com/ubuntu/ focal-proposed main restricted universe multiverse
+#deb-src http://mirrors.cloud.tencent.com/ubuntu/ focal-backports main restricted universe multiverse