diff --git a/keygen.js b/keygen.js
new file mode 100644
index 0000000..cf503fb
--- /dev/null
+++ b/keygen.js
@@ -0,0 +1,62 @@
+module.exports = async ({
+  github,
+  context,
+  core,
+  KEYGEN_JS_CODE
+}) => {
+  async function endWithComment(words, isok) {
+    await github.rest.issues.createComment({
+      issue_number: context.issue.number,
+      owner: context.repo.owner,
+      repo: context.repo.repo,
+      body: words || '指令匹配错误\n\ncommand match error'
+    });
+    await github.rest.issues.update({
+      owner: context.repo.owner,
+      repo: context.repo.repo,
+      issue_number: context.issue.number,
+      state: 'closed',
+      labels: [isok ? '☑️keygen/注册机🎉' : '🤔invalid/无效的😒']
+    });
+    return;
+  }
+
+  if (context.payload.issue.title === 'keygen') {
+    try {
+      const info = context.payload.issue.body;
+      const commMatch = info.replace(/\r/g, '').match(/<!--.+-->/s);
+
+      if (commMatch) {
+        const conf = commMatch[0].split('\n').filter(i => !i.match(/：|<!--|-->/));
+
+        if (conf.length === 3) {
+          const key = KEYGEN_JS_CODE(...conf);
+          await endWithComment(`您的离线激活码为/Your offline activation code is:
+
+\`+${key}\`
+
+---
+
+最好在\`host\`中添加如下拦截，以防联网检测（懒，未删除该部分内容）
+
+It is best to add the following interception to the \`host\` to prevent network detection (cause of lazy, this part of the content did not deleted)
+
+\`\`\`
+0.0.0.0 store.typora.io
+0.0.0.0 dian.typora.com.cn
+0.0.0.0 typora.com.cn
+\`\`\``, true);
+          return
+        }
+      }
+
+      await endWithComment('无法正确匹配到配置信息\n\nCan not match the configuration information correctly.');
+      return;
+    } catch (error) {
+      await endWithComment('激活码计算过程中发生错误\n\nAn error occurred during activation code calculation');
+      return
+    }
+  } else {
+    await endWithComment();
+  }
+};