diff --git a/.github/workflows/docker.yml b/.github/workflows/docker.yml
index 7f429a5..f9687ce 100644
--- a/.github/workflows/docker.yml
+++ b/.github/workflows/docker.yml
@@ -72,7 +72,7 @@ jobs:
     name: python
     needs:
       - prepare
-    if: ${{ github.event_name != 'pull_request' || (!cancelled() && contains(needs.prepare.outputs.pr-labels, 'python')) }}
+    if: ${{ !cancelled() && (github.event_name != 'pull_request' || contains(needs.prepare.outputs.pr-labels, 'python')) }}
     uses: ./.github/workflows/_docker-build.yml
     with:
       target: 'python'
@@ -88,7 +88,7 @@ jobs:
     needs:
       - prepare
       - python
-    if: ${{ github.event_name != 'pull_request' || (!cancelled() && contains(needs.prepare.outputs.pr-labels, 'cann')) }}
+    if: ${{ !cancelled() && (github.event_name != 'pull_request' || contains(needs.prepare.outputs.pr-labels, 'cann')) }}
     uses: ./.github/workflows/_docker-build.yml
     with:
       target: 'cann'
@@ -100,7 +100,7 @@ jobs:
     needs:
       - prepare
       - cann
-    if: ${{ github.event_name != 'pull_request' || (!cancelled() && contains(needs.prepare.outputs.pr-labels, 'pytorch')) }}
+    if: ${{ !cancelled() && (github.event_name != 'pull_request' || contains(needs.prepare.outputs.pr-labels, 'pytorch')) }}
     uses: ./.github/workflows/_docker-build.yml
     with:
       target: 'pytorch'
@@ -112,7 +112,7 @@ jobs:
     needs:
       - prepare
       - cann
-    if: ${{ github.event_name != 'pull_request' || (!cancelled() && contains(needs.prepare.outputs.pr-labels, 'mindspore')) }}
+    if: ${{ !cancelled() && (github.event_name != 'pull_request' || contains(needs.prepare.outputs.pr-labels, 'mindspore')) }}
     uses: ./.github/workflows/_docker-build.yml
     with:
       target: 'mindspore'
diff --git a/CONTRIBUTING_zh.md b/CONTRIBUTING_zh.md
new file mode 100644
index 0000000..9c12aef
--- /dev/null
+++ b/CONTRIBUTING_zh.md
@@ -0,0 +1,61 @@
+# 贡献指南
+
+## 代码结构
+
+```
+.
+├── arg.json                # 构建参数矩阵
+├── cann/                   # CANN 镜像目录
+├── docker-bake.hcl         # Bake 配置
+├── mindspore/              # MindSpore 镜像目录
+├── python/                 # Python 镜像目录
+└── pytorch/                # PyTorch 镜像目录
+```
+
+镜像关系如下图所示。
+
+- [python](./python): 由于 CANN Toolkit 依赖 Python 环境，
+  因此单独构建 Python 镜像作为 CANN 镜像的基础镜像，其 Python 包采用源码构建而成，
+  详情见 [python.sh](./python/python.sh)。
+
+- [cann](./cann): CANN 镜像中安装了 `ascend-cann-toolkit` 和 `ascend-cann-kernels`
+  以及运行时必要的依赖，详情见 [cann.sh](./cann/cann.sh)。
+
+- [pytorch](./pytorch): PyTorch 镜像将 CANN 镜像作为基础镜像，
+  同时安装了 `torch` 和 `torch_npu`，详情见 [Dockerfile](./pytorch/Dockerfile)。
+
+- [mindspore](./mindspore): MindSpore 镜像将 CANN 镜像作为基础镜像，
+  同时安装了 `mindspore`，详情见 [Dockerfile](./mindspore/Dockerfile)。
+
+```mermaid
+graph TD;
+  Python-->CANN;
+  CANN-->PyTorch;
+  CANN-->MindSpore;
+```
+
+## 镜像构建
+
+提供两种镜像构建方式：使用 [Bake][0] 构建和使用传统的 `docker build` 构建。
+
+- Bake 构建方式：CI/CD 中使用 Bake 来构建镜像，以此简化构建配置。
+  Bake 配置文件见 [docker-bake.hcl](./docker-bake.hcl) 和 [arg.json](./arg.json)。
+  其中 `docker-bake.hcl` 中定义了各类镜像的构建配置，`arg.json` 中定义了各类镜像的构建参数。
+
+- 传统构建方式：对于需要自定义构建镜像的用户，可以选择使用传统的 `docker build` 方式。
+
+[0]: https://docs.docker.com/build/bake/
+
+## CI/CD
+
+基于 GitHub Actions 构建 CI/CD 系统，运行在 [GitHub-hosted runner][10] 上。
+
+提交 Pull request 时可触发镜像构建，只有当 release 时才会发布镜像。
+工作流运行详情见：[actions/workflows/docker.yml][11]。
+
+> [!NOTE]  
+> 为节省服务器资源，只有 Pull request 中添加了对应的 [label][12]，才会构建相应的镜像。
+
+[10]: https://github.com/actions/runner-images
+[11]: https://github.com/openmerlin/dockerfile/actions/workflows/docker.yml
+[12]: https://github.com/openmerlin/dockerfile/labels
diff --git a/cann/cann.sh b/cann/cann.sh
index ac10f6f..be95cac 100755
--- a/cann/cann.sh
+++ b/cann/cann.sh
@@ -2,7 +2,7 @@
 
 set -e
 
-get_architecture() {
+_get_architecture() {
     # not case sensitive
     shopt -s nocasematch
 
@@ -22,6 +22,10 @@ get_architecture() {
     echo "${ARCH}"
 }
 
+_retry() {
+    "$@" || (sleep 10 && "$@") || (sleep 20 && "$@") || (sleep 40 && "$@")
+}
+
 download_file() {
     set +e
 
@@ -59,9 +63,12 @@ download_cann() {
     else
         local url_prefix="${url}/CANN/CANN%20${CANN_VERSION}"
     fi
-    local url_suffix="response-content-type=application/octet-stream"
-    local toolkit_url="${url_prefix}/${TOOLKIT_FILE}?${url_suffix}"
-    local kernels_url="${url_prefix}/${KERNELS_FILE}?${url_suffix}"
+    # local url_suffix="response-content-type=application/octet-stream"
+    # local toolkit_url="${url_prefix}/${TOOLKIT_FILE}?${url_suffix}"
+    # local kernels_url="${url_prefix}/${KERNELS_FILE}?${url_suffix}"
+
+    local toolkit_url="${url_prefix}/${TOOLKIT_FILE}"
+    local kernels_url="${url_prefix}/${KERNELS_FILE}"
 
     if [ ! -f "${TOOLKIT_PATH}" ]; then
         download_file "${toolkit_url}" "${TOOLKIT_PATH}"
@@ -121,7 +128,7 @@ install_cann() {
 }
 
 PLATFORM=${PLATFORM:=$(uname -s)/$(uname -m)}
-ARCH=$(get_architecture)
+ARCH=$(_get_architecture)
 CANN_HOME=${CANN_HOME:="/usr/local/Ascend"}
 CANN_CHIP=${CANN_CHIP:="910b"}
 CANN_VERSION=${CANN_VERSION:="8.0.RC1"}