diff --git a/.gitignore b/.gitignore
index 8f20045..f6dc568 100644
--- a/.gitignore
+++ b/.gitignore
@@ -9,3 +9,4 @@ node_modules/
 frameworks/tools/qt/build-simulator*
 frameworks/tools/qt/simulator/font/
 frameworks/tools/qt/simulator/simulator.pro.user
+frameworks/packages/runtime-core/jerryscript
diff --git a/frameworks/packages/runtime-core/build-core.sh b/frameworks/packages/runtime-core/build-core.sh
new file mode 100644
index 0000000..e362df9
--- /dev/null
+++ b/frameworks/packages/runtime-core/build-core.sh
@@ -0,0 +1,45 @@
+#!/bin/bash
+#Copyright (c) 2020-2021 Huawei Device Co., Ltd.
+#Licensed under the Apache License, Version 2.0 (the "License");
+#you may not use this file except in compliance with the License.
+#You may obtain a copy of the License at
+#
+#    http://www.apache.org/licenses/LICENSE-2.0
+#
+#Unless required by applicable law or agreed to in writing, software
+#distributed under the License is distributed on an "AS IS" BASIS,
+#WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#See the License for the specific language governing permissions and
+#limitations under the License.
+set -e
+
+echo "=================================================="
+echo "== this tool is just for linux host environment =="
+echo "== prerequires: node.js and python3 installed    =="
+echo "=================================================="
+
+# step 1: npm install and build
+npm install
+npm run build
+
+# step 2: clone jerryscript repo
+rm -rf jerryscript
+git clone git@gitee.com:openharmony/third_party_jerryscript.git jerryscript
+
+# step 3: reset the commit to the 2.1.0 tag
+pushd ./jerryscript
+git reset --hard e8bc7a2b93a6edfa463458c8bb69fac2a36feb9e
+
+# step 4: compile jerry snapshot tool
+python tools/build.py --mem-heap=64 --snapshot-exec=ON --snapshot-save=ON \
+        --profile=es5.1 --error-messages=ON --logging=ON --mem-stats=ON \
+        --jerry-cmdline-snapshot=ON
+
+# step 5: convert framework.min.js to byte code file
+popd
+./jerryscript/build/bin/jerry-snapshot generate -o ./build/framework.min.bc ./build/framework.min.js
+
+echo "snapshot generating done."
+
+# step 6: convert framework.min.js and framework.min.bc into C files
+python3 ./../../tools/snapshot/framework2char.py
diff --git a/frameworks/packages/runtime-core/contribution.md b/frameworks/packages/runtime-core/contribution.md
index 02d9f02..d305067 100644
--- a/frameworks/packages/runtime-core/contribution.md
+++ b/frameworks/packages/runtime-core/contribution.md
@@ -1,36 +1,24 @@
-/*
- * Copyright (c) 2020 Huawei Device Co., Ltd.
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
- # How to contribute to the runtime-core of JS framework
- ## 1. Modify code
- ## 2. Compile the framework itself
- > npm install
- > npm run build
-
- you will get the **framework.min.js** output under `runtime-core/build` folder
- ## 3. Prepare the snapshot tool
- run `ace_lite_jsfwk/tools/snapshot/jerry-bin/build_jerry.sh`, the `jerry-snapshot` tool will be generated into `ace_lite_jsfwk/tools/snapshot/jerry-bin/linux/`.
-
- ## 4. Generate framework.min.bc
- > cd packages/runtime-core/build/
- > ./../../../tools/snapshot/jerry_bin/linux/jerry-snapshot generate -o framework.min.bc ./framework.min.js
-
- ## 5. Update the JS and snapshot array in C++ code
- > cd tools/snapshot/
- > python framework2char.py
-
- ## 6. add changed file to git
- > git add src/core/base/framework_min_js.h
- > git add src/core/base/framework_min_bc.h
+/*
+ * Copyright (c) 2020-2021 Huawei Device Co., Ltd.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+ # How to contribute to the runtime-core of JS framework
+ ## 1. Modify code
+ ## 2. run the build-core.sh file
+ > cd ace_engine_lite/frameworks/packages/runtime-core/
+ > ./build_core.sh
+
+ ## 3. add following two C header files to git and upload them to your PR
+ > git add src/core/base/framework_min_js.h
+ > git add src/core/base/framework_min_bc.h
diff --git a/frameworks/tools/snapshot/framework2char.py b/frameworks/tools/snapshot/framework2char.py
index d3430ef..38d6c75 100644
--- a/frameworks/tools/snapshot/framework2char.py
+++ b/frameworks/tools/snapshot/framework2char.py
@@ -33,7 +33,7 @@ JS_OUTPUT_C_FILE_PATH = os.path.join(
 
 def output_copyright(output):
     output.write("/*\n")
-    output.write(" * Copyright (c) 2020 Huawei Device Co., Ltd.\n")
+    output.write(" * Copyright (c) 2020-2021 Huawei Device Co., Ltd.\n")
     output.write(" * Licensed under the Apache License, Version 2.0")
     output.write(" (the \"License\");\n")
     output.write(" * you may not use this file except in compliance ")
@@ -57,7 +57,7 @@ def output_copyright(output):
 
 def output_check_notes(output):
     output.write("// AUTO GENERATED, PLEASE DO NOT EDIT DIRECTLY\n")
-    output.write("#include <stdint.h>\n\n")
+    output.write("#include <cstdint>\n\n")
     output.write("#ifndef ACELITE_FRAMEWORK_RAW_BUFFER\n")
     output.write("#error THIS FILE CAN ONLY BE INCLUDED BY RAW BUFFER CPP\n")
     output.write("#endif\n\n")