diff --git a/code/HelloWorld/.gitignore b/code/HelloWorld/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..d2ff20141ceed86d87c0ea5d99481973005bab2b
--- /dev/null
+++ b/code/HelloWorld/.gitignore
@@ -0,0 +1,12 @@
+/node_modules
+/oh_modules
+/local.properties
+/.idea
+**/build
+/.hvigor
+.cxx
+/.clangd
+/.clang-format
+/.clang-tidy
+**/.test
+/.appanalyzer
\ No newline at end of file
diff --git a/code/HelloWorld/AppScope/app.json5 b/code/HelloWorld/AppScope/app.json5
new file mode 100644
index 0000000000000000000000000000000000000000..d5a8ecd99aa6b108e78923bf142d817dded3f4a7
--- /dev/null
+++ b/code/HelloWorld/AppScope/app.json5
@@ -0,0 +1,10 @@
+{
+  "app": {
+    "bundleName": "com.example.helloworld",
+    "vendor": "example",
+    "versionCode": 1000000,
+    "versionName": "1.0.0",
+    "icon": "$media:app_icon",
+    "label": "$string:app_name"
+  }
+}
diff --git a/code/HelloWorld/AppScope/resources/base/element/string.json b/code/HelloWorld/AppScope/resources/base/element/string.json
new file mode 100644
index 0000000000000000000000000000000000000000..a804dbe3a44d5ab8c6887f0ac79db47ff19f85a7
--- /dev/null
+++ b/code/HelloWorld/AppScope/resources/base/element/string.json
@@ -0,0 +1,8 @@
+{
+  "string": [
+    {
+      "name": "app_name",
+      "value": "HelloWorld"
+    }
+  ]
+}
diff --git a/code/HelloWorld/AppScope/resources/base/media/app_icon.png b/code/HelloWorld/AppScope/resources/base/media/app_icon.png
new file mode 100644
index 0000000000000000000000000000000000000000..a39445dc87828b76fed6d2ec470dd455c45319e3
Binary files /dev/null and b/code/HelloWorld/AppScope/resources/base/media/app_icon.png differ
diff --git a/code/HelloWorld/build-profile.json5 b/code/HelloWorld/build-profile.json5
new file mode 100644
index 0000000000000000000000000000000000000000..436e508f6263c5132523026bfec8fdcbaf9c53f0
--- /dev/null
+++ b/code/HelloWorld/build-profile.json5
@@ -0,0 +1,42 @@
+{
+  "app": {
+    "signingConfigs": [],
+    "products": [
+      {
+        "name": "default",
+        "signingConfig": "default",
+        "compatibleSdkVersion": 14,
+        "compileSdkVersion": 20,
+        "runtimeOS": "OpenHarmony",
+        "buildOption": {
+          "strictMode": {
+            "caseSensitiveCheck": true,
+            "useNormalizedOHMUrl": true
+          }
+        }
+      }
+    ],
+    "buildModeSet": [
+      {
+        "name": "debug",
+      },
+      {
+        "name": "release"
+      }
+    ]
+  },
+  "modules": [
+    {
+      "name": "entry",
+      "srcPath": "./entry",
+      "targets": [
+        {
+          "name": "default",
+          "applyToProducts": [
+            "default"
+          ]
+        }
+      ]
+    }
+  ]
+}
\ No newline at end of file
diff --git a/code/HelloWorld/code-linter.json5 b/code/HelloWorld/code-linter.json5
new file mode 100644
index 0000000000000000000000000000000000000000..073990fa45394e1f8e85d85418ee60a8953f9b99
--- /dev/null
+++ b/code/HelloWorld/code-linter.json5
@@ -0,0 +1,32 @@
+{
+  "files": [
+    "**/*.ets"
+  ],
+  "ignore": [
+    "**/src/ohosTest/**/*",
+    "**/src/test/**/*",
+    "**/src/mock/**/*",
+    "**/node_modules/**/*",
+    "**/oh_modules/**/*",
+    "**/build/**/*",
+    "**/.preview/**/*"
+  ],
+  "ruleSet": [
+    "plugin:@performance/recommended",
+    "plugin:@typescript-eslint/recommended"
+  ],
+  "rules": {
+    "@security/no-unsafe-aes": "error",
+    "@security/no-unsafe-hash": "error",
+    "@security/no-unsafe-mac": "warn",
+    "@security/no-unsafe-dh": "error",
+    "@security/no-unsafe-dsa": "error",
+    "@security/no-unsafe-ecdsa": "error",
+    "@security/no-unsafe-rsa-encrypt": "error",
+    "@security/no-unsafe-rsa-sign": "error",
+    "@security/no-unsafe-rsa-key": "error",
+    "@security/no-unsafe-dsa-key": "error",
+    "@security/no-unsafe-dh-key": "error",
+    "@security/no-unsafe-3des": "error"
+  }
+}
\ No newline at end of file
diff --git a/code/HelloWorld/entry/.gitignore b/code/HelloWorld/entry/.gitignore
new file mode 100644
index 0000000000000000000000000000000000000000..e2713a2779c5a3e0eb879efe6115455592caeea5
--- /dev/null
+++ b/code/HelloWorld/entry/.gitignore
@@ -0,0 +1,6 @@
+/node_modules
+/oh_modules
+/.preview
+/build
+/.cxx
+/.test
\ No newline at end of file
diff --git a/code/HelloWorld/entry/build-profile.json5 b/code/HelloWorld/entry/build-profile.json5
new file mode 100644
index 0000000000000000000000000000000000000000..8ac81840b69fd7c78c2024c6570ed01e4292cf6d
--- /dev/null
+++ b/code/HelloWorld/entry/build-profile.json5
@@ -0,0 +1,29 @@
+{
+  "apiType": "stageMode",
+  "arkTSVersion": "1.2",
+  "buildOption": {
+  },
+  "buildOptionSet": [
+    {
+      "name": "release",
+      "arkOptions": {
+        "obfuscation": {
+          "ruleOptions": {
+            "enable": false,
+            "files": [
+              "./obfuscation-rules.txt"
+            ]
+          }
+        }
+      }
+    },
+  ],
+  "targets": [
+    {
+      "name": "default"
+    },
+    {
+      "name": "ohosTest",
+    }
+  ]
+}
\ No newline at end of file
diff --git a/code/HelloWorld/entry/hvigorfile.ts b/code/HelloWorld/entry/hvigorfile.ts
new file mode 100644
index 0000000000000000000000000000000000000000..c6edcd90486dd5a853cf7d34c8647f08414ca7a3
--- /dev/null
+++ b/code/HelloWorld/entry/hvigorfile.ts
@@ -0,0 +1,6 @@
+import { hapTasks } from '@ohos/hvigor-ohos-plugin';
+
+export default {
+    system: hapTasks,  /* Built-in plugin of Hvigor. It cannot be modified. */
+    plugins:[]         /* Custom plugin to extend the functionality of Hvigor. */
+}
diff --git a/code/HelloWorld/entry/obfuscation-rules.txt b/code/HelloWorld/entry/obfuscation-rules.txt
new file mode 100644
index 0000000000000000000000000000000000000000..272efb6ca3f240859091bbbfc7c5802d52793b0b
--- /dev/null
+++ b/code/HelloWorld/entry/obfuscation-rules.txt
@@ -0,0 +1,23 @@
+# Define project specific obfuscation rules here.
+# You can include the obfuscation configuration files in the current module's build-profile.json5.
+#
+# For more details, see
+#   https://developer.huawei.com/consumer/cn/doc/harmonyos-guides-V5/source-obfuscation-V5
+
+# Obfuscation options:
+# -disable-obfuscation: disable all obfuscations
+# -enable-property-obfuscation: obfuscate the property names
+# -enable-toplevel-obfuscation: obfuscate the names in the global scope
+# -compact: remove unnecessary blank spaces and all line feeds
+# -remove-log: remove all console.* statements
+# -print-namecache: print the name cache that contains the mapping from the old names to new names
+# -apply-namecache: reuse the given cache file
+
+# Keep options:
+# -keep-property-name: specifies property names that you want to keep
+# -keep-global-name: specifies names that you want to keep in the global scope
+
+-enable-property-obfuscation
+-enable-toplevel-obfuscation
+-enable-filename-obfuscation
+-enable-export-obfuscation
\ No newline at end of file
diff --git a/code/HelloWorld/entry/oh-package.json5 b/code/HelloWorld/entry/oh-package.json5
new file mode 100644
index 0000000000000000000000000000000000000000..248c3b7541a589682a250f86a6d3ecf7414d2d6a
--- /dev/null
+++ b/code/HelloWorld/entry/oh-package.json5
@@ -0,0 +1,10 @@
+{
+  "name": "entry",
+  "version": "1.0.0",
+  "description": "Please describe the basic information.",
+  "main": "",
+  "author": "",
+  "license": "",
+  "dependencies": {}
+}
+
diff --git a/code/HelloWorld/entry/src/main/ets/entryability/EntryAbility.ets b/code/HelloWorld/entry/src/main/ets/entryability/EntryAbility.ets
new file mode 100644
index 0000000000000000000000000000000000000000..b8c877dac17545fcb0420d1228764fd174d1e9d9
--- /dev/null
+++ b/code/HelloWorld/entry/src/main/ets/entryability/EntryAbility.ets
@@ -0,0 +1,31 @@
+import UIAbility from '@ohos.app.ability.UIAbility';
+import AbilityConstant from '@ohos.app.ability.AbilityConstant';
+import Want from '@ohos.app.ability.Want';
+import window from '@ohos.window';
+import { BusinessError } from '@ohos.base';
+import hilog from '@ohos.hilog';
+import { MyCallback } from '../models/MyCallback';
+
+
+class EntryAbility extends UIAbility {
+  onCreate(want: Want, launchParam: AbilityConstant.LaunchParam): void {
+    hilog.info(0x0000, 'testTag', 'EntryAbility onCreate');
+  }
+
+  onWindowStageCreate(windowStage: window.WindowStage): void {
+    hilog.info(0x0000, 'testTag', 'EntryAbility onWindowStageCreate');
+    try {
+      windowStage.loadContent('pages/Index', (err: BusinessError<void>): void => {
+        hilog.info(0x0000, 'testTag', 'loadContent entering');
+        MyCallback.runCasesOfCallback();
+        if (err) {
+          hilog.info(0x0000, 'testTag', 'loadContent error');
+          return;
+        }
+        hilog.info(0x0000, 'testTag', 'loadContent ok');
+      });
+    } catch (e: Error) {
+      hilog.info(0x0000, 'testTag', 'loadContent catch error：-----------' + e.message);
+    }
+  }
+}
\ No newline at end of file
diff --git a/code/HelloWorld/entry/src/main/ets/models/MyCallback.ets b/code/HelloWorld/entry/src/main/ets/models/MyCallback.ets
new file mode 100644
index 0000000000000000000000000000000000000000..708065d57cb910dc5f650d166f31b130b729e6ca
--- /dev/null
+++ b/code/HelloWorld/entry/src/main/ets/models/MyCallback.ets
@@ -0,0 +1,40 @@
+import { AsyncCallback, BusinessError, Callback, ErrorCallback } from '@ohos.base';
+import hilog from '@ohos.hilog';
+
+const SYNTAX_ERROR_CODE: double = 1002;
+
+export class MyCallback {
+  static myCallback(callback: Callback<string>): void {
+    hilog.info(0x0000, 'testTag', 'myCallback');
+    callback('myCallback');
+  }
+
+  static myAsyncCallback(callback: AsyncCallback<string, string>): void {
+    hilog.info(0x0000, 'testTag', 'myAsyncCallback');
+    let error = new Error('Business Error', 'basicError2 message', undefined);
+    let be2: BusinessError<string> = new BusinessError<string>(SYNTAX_ERROR_CODE, error);
+    callback(be2, 'yAsyncCallback');
+  }
+
+  static myErrorCallback(callback: ErrorCallback<BusinessError<string>>): void {
+    hilog.info(0x0000, 'testTag', 'myErrorCallback');
+    let error = new Error('Business Error', 'myErrorCallback message', undefined);
+    let result: string = 'test';
+    let be: BusinessError<string> = new BusinessError<string>(SYNTAX_ERROR_CODE, result, error);
+    callback(be);
+  }
+
+  static runCasesOfCallback() {
+    MyCallback.myCallback((data: string) => {
+      hilog.info(0x0000, 'testTag', 'MyCallback' + data);
+    })
+    MyCallback.myAsyncCallback((error: BusinessError<string>, result: string) => {
+      if (error && result) {
+        hilog.info(0x0000, 'testTag', `myAsyncCallback, error: ${error.message}, result:${result}`);
+      }
+    })
+    MyCallback.myErrorCallback((error: BusinessError<string>) => {
+      hilog.info(0x0000, 'testTag', `myAsyncCallback, error: ${error.message}`);
+    })
+  }
+}
\ No newline at end of file
diff --git a/code/HelloWorld/entry/src/main/ets/pages/Index.ets b/code/HelloWorld/entry/src/main/ets/pages/Index.ets
new file mode 100644
index 0000000000000000000000000000000000000000..c8bf18495ab813027eadeae44773b173ac5817d6
--- /dev/null
+++ b/code/HelloWorld/entry/src/main/ets/pages/Index.ets
@@ -0,0 +1,33 @@
+import { Entry, Text, Column, Component, Button, ClickEvent } from '@ohos.arkui.component'
+import { State } from '@ohos.arkui.stateManagement'
+import hilog from '@ohos.hilog'
+
+@Entry
+@Component
+struct MyStateSample {
+  @State stateVar: string = 'state var';
+  message: string = 'var';
+  changeValue() {
+    this.stateVar+='~'
+  }
+  build() {
+    Column(undefined) {
+      Text('Hello World').fontSize(20)
+      Button(this.message).backgroundColor('#FFFF00FF')
+        .onClick((e: ClickEvent) => {
+          hilog.info(0x0000, 'testTag', 'On Click');
+          this.changeValue();
+        })
+      Text(this.stateVar).fontSize(20)
+      Child({stateVar: this.stateVar} as __Options_Child)
+    }
+  }
+}
+
+@Component
+struct Child {
+  @State stateVar: string = 'Child';
+  build() {
+    Text(this.stateVar).fontSize(50)
+  }
+}
diff --git a/code/HelloWorld/entry/src/main/module.json5 b/code/HelloWorld/entry/src/main/module.json5
new file mode 100644
index 0000000000000000000000000000000000000000..7c6698c425bd7c8a02ea156796f79fd4fd1b3fc2
--- /dev/null
+++ b/code/HelloWorld/entry/src/main/module.json5
@@ -0,0 +1,37 @@
+{
+  "module": {
+    "name": "entry",
+    "type": "entry",
+    "description": "$string:module_desc",
+    "mainElement": "EntryAbility",
+    "deviceTypes": [
+      "default",
+      "tablet",
+    ],
+    "deliveryWithInstall": true,
+    "installationFree": false,
+    "pages": "$profile:main_pages",
+    "abilities": [
+      {
+        "name": "EntryAbility",
+        "srcEntry": "./ets/entryability/EntryAbility.ets",
+        "description": "$string:EntryAbility_desc",
+        "icon": "$media:layered_image",
+        "label": "$string:EntryAbility_label",
+        "startWindowIcon": "$media:startIcon",
+        "startWindowBackground": "$color:start_window_background",
+        "exported": true,
+        "skills": [
+          {
+            "entities": [
+              "entity.system.home"
+            ],
+            "actions": [
+              "action.system.home"
+            ]
+          }
+        ]
+      }
+    ]
+  }
+}
\ No newline at end of file
diff --git a/code/HelloWorld/entry/src/main/resources/base/element/color.json b/code/HelloWorld/entry/src/main/resources/base/element/color.json
new file mode 100644
index 0000000000000000000000000000000000000000..3c712962da3c2751c2b9ddb53559afcbd2b54a02
--- /dev/null
+++ b/code/HelloWorld/entry/src/main/resources/base/element/color.json
@@ -0,0 +1,8 @@
+{
+  "color": [
+    {
+      "name": "start_window_background",
+      "value": "#FFFFFF"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/code/HelloWorld/entry/src/main/resources/base/element/float.json b/code/HelloWorld/entry/src/main/resources/base/element/float.json
new file mode 100644
index 0000000000000000000000000000000000000000..33ea22304f9b1485b5f22d811023701b5d4e35b6
--- /dev/null
+++ b/code/HelloWorld/entry/src/main/resources/base/element/float.json
@@ -0,0 +1,8 @@
+{
+  "float": [
+    {
+      "name": "page_text_font_size",
+      "value": "50fp"
+    }
+  ]
+}
diff --git a/code/HelloWorld/entry/src/main/resources/base/element/string.json b/code/HelloWorld/entry/src/main/resources/base/element/string.json
new file mode 100644
index 0000000000000000000000000000000000000000..f94595515a99e0c828807e243494f57f09251930
--- /dev/null
+++ b/code/HelloWorld/entry/src/main/resources/base/element/string.json
@@ -0,0 +1,16 @@
+{
+  "string": [
+    {
+      "name": "module_desc",
+      "value": "module description"
+    },
+    {
+      "name": "EntryAbility_desc",
+      "value": "description"
+    },
+    {
+      "name": "EntryAbility_label",
+      "value": "label"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/code/HelloWorld/entry/src/main/resources/base/media/background.png b/code/HelloWorld/entry/src/main/resources/base/media/background.png
new file mode 100644
index 0000000000000000000000000000000000000000..923f2b3f27e915d6871871deea0420eb45ce102f
Binary files /dev/null and b/code/HelloWorld/entry/src/main/resources/base/media/background.png differ
diff --git a/code/HelloWorld/entry/src/main/resources/base/media/foreground.png b/code/HelloWorld/entry/src/main/resources/base/media/foreground.png
new file mode 100644
index 0000000000000000000000000000000000000000..97014d3e10e5ff511409c378cd4255713aecd85f
Binary files /dev/null and b/code/HelloWorld/entry/src/main/resources/base/media/foreground.png differ
diff --git a/code/HelloWorld/entry/src/main/resources/base/media/layered_image.json b/code/HelloWorld/entry/src/main/resources/base/media/layered_image.json
new file mode 100644
index 0000000000000000000000000000000000000000..fb49920440fb4d246c82f9ada275e26123a2136a
--- /dev/null
+++ b/code/HelloWorld/entry/src/main/resources/base/media/layered_image.json
@@ -0,0 +1,7 @@
+{
+  "layered-image":
+  {
+    "background" : "$media:background",
+    "foreground" : "$media:foreground"
+  }
+}
\ No newline at end of file
diff --git a/code/HelloWorld/entry/src/main/resources/base/media/startIcon.png b/code/HelloWorld/entry/src/main/resources/base/media/startIcon.png
new file mode 100644
index 0000000000000000000000000000000000000000..205ad8b5a8a42e8762fbe4899b8e5e31ce822b8b
Binary files /dev/null and b/code/HelloWorld/entry/src/main/resources/base/media/startIcon.png differ
diff --git a/code/HelloWorld/entry/src/main/resources/base/profile/backup_config.json b/code/HelloWorld/entry/src/main/resources/base/profile/backup_config.json
new file mode 100644
index 0000000000000000000000000000000000000000..78f40ae7c494d71e2482278f359ec790ca73471a
--- /dev/null
+++ b/code/HelloWorld/entry/src/main/resources/base/profile/backup_config.json
@@ -0,0 +1,3 @@
+{
+  "allowToBackupRestore": true
+}
\ No newline at end of file
diff --git a/code/HelloWorld/entry/src/main/resources/base/profile/main_pages.json b/code/HelloWorld/entry/src/main/resources/base/profile/main_pages.json
new file mode 100644
index 0000000000000000000000000000000000000000..1898d94f58d6128ab712be2c68acc7c98e9ab9ce
--- /dev/null
+++ b/code/HelloWorld/entry/src/main/resources/base/profile/main_pages.json
@@ -0,0 +1,5 @@
+{
+  "src": [
+    "pages/Index"
+  ]
+}
diff --git a/code/HelloWorld/entry/src/main/resources/dark/element/color.json b/code/HelloWorld/entry/src/main/resources/dark/element/color.json
new file mode 100644
index 0000000000000000000000000000000000000000..79b11c2747aec33e710fd3a7b2b3c94dd9965499
--- /dev/null
+++ b/code/HelloWorld/entry/src/main/resources/dark/element/color.json
@@ -0,0 +1,8 @@
+{
+  "color": [
+    {
+      "name": "start_window_background",
+      "value": "#000000"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/code/HelloWorld/hvigor/hvigor-config.json5 b/code/HelloWorld/hvigor/hvigor-config.json5
new file mode 100644
index 0000000000000000000000000000000000000000..fe83c3e838abfb3629eed84f6c7092f306d818f9
--- /dev/null
+++ b/code/HelloWorld/hvigor/hvigor-config.json5
@@ -0,0 +1,22 @@
+{
+  "modelVersion": "5.0.2",
+  "dependencies": {
+  },
+  "execution": {
+    // "analyze": "normal",                     /* Define the build analyze mode. Value: [ "normal" | "advanced" | false ]. Default: "normal" */
+    // "daemon": true,                          /* Enable daemon compilation. Value: [ true | false ]. Default: true */
+    // "incremental": true,                     /* Enable incremental compilation. Value: [ true | false ]. Default: true */
+    // "parallel": true,                        /* Enable parallel compilation. Value: [ true | false ]. Default: true */
+    // "typeCheck": false,                      /* Enable typeCheck. Value: [ true | false ]. Default: false */
+  },
+  "logging": {
+    // "level": "info"                          /* Define the log level. Value: [ "debug" | "info" | "warn" | "error" ]. Default: "info" */
+  },
+  "debugging": {
+    // "stacktrace": false                      /* Disable stacktrace compilation. Value: [ true | false ]. Default: false */
+  },
+  "nodeOptions": {
+    // "maxOldSpaceSize": 8192                  /* Enable nodeOptions maxOldSpaceSize compilation. Unit M. Used for the daemon process. Default: 8192*/
+    // "exposeGC": true                         /* Enable to trigger garbage collection explicitly. Default: true*/
+  }
+}
diff --git a/code/HelloWorld/hvigorfile.ts b/code/HelloWorld/hvigorfile.ts
new file mode 100644
index 0000000000000000000000000000000000000000..f3cb9f1a87a81687554a76283af8df27d8bda775
--- /dev/null
+++ b/code/HelloWorld/hvigorfile.ts
@@ -0,0 +1,6 @@
+import { appTasks } from '@ohos/hvigor-ohos-plugin';
+
+export default {
+    system: appTasks,  /* Built-in plugin of Hvigor. It cannot be modified. */
+    plugins:[]         /* Custom plugin to extend the functionality of Hvigor. */
+}
diff --git a/code/HelloWorld/oh-package.json5 b/code/HelloWorld/oh-package.json5
new file mode 100644
index 0000000000000000000000000000000000000000..9c36c086ae807ea710acd9e480cb6cc1d18bd011
--- /dev/null
+++ b/code/HelloWorld/oh-package.json5
@@ -0,0 +1,10 @@
+{
+  "modelVersion": "5.0.2",
+  "description": "Please describe the basic information.",
+  "dependencies": {
+  },
+  "devDependencies": {
+    "@ohos/hypium": "1.0.21",
+    "@ohos/hamock": "1.0.0"
+  }
+}