Expanded column: Chinese vocabulary, pinyin kuò liè, is a social code word. Expansion refers to expanding and adding, and column refers to the friend list. Simply put, it means asking you if you can add friends. It is a commonly used vocabulary on the Internet. Expanding lists originated before the posts in Li Gongjun's bar were cleared for the second time. Members of the bar were prohibited from leaving any contact information, and all friendship-type posts would be blocked by the administrator. Therefore, members in the bar called the posts about friendship "expanded lists" and later evolved. It is a common code word for some people born in 1995-05.
Group expansion: refers to several people socializing together and expanding their network in a small group.