User activity extensions/zh分类包含监视用户活动（登录、退出、新用户创建等）的扩展条目。
This category has the following 7 subcategories, out of 7 total.
The number of included categories (C), pages (P) and files (F) is stated in brackets.
Pages in category "分类:用户活动扩展"
The following 10 pages are in this category, out of 10 total.