What is the field number of WeChat chat interface?

This is a topic tag function in WeChat, which is the meaning of the topic. Its function is to let more people know about the topic. When publishing a circle of friends, enter the symbol # directly, and then enter the topic after the symbol #. If you want to separate the label from the circle of friends, you can separate it with spaces or line breaks. Click Publish in the upper right corner to view the topic with pound symbol published by friends circle, and click the topic label in blue font to view the related video number information.