How does WeChat send messages to friends regularly?

Wechat regularly sends messages to friends as follows:

Mobile phone: Redmi k40

System: MIUI 13.0.7

Software: WeChat 8.0.4

1. First open WeChat and click the search icon in the upper right corner.

2. Enter a small program to send information regularly.

3. On the search results page that opens, we click Send applet regularly.

4. On the regular sending operation page, we click the "+"icon to create regular sending content.

5. Fill in the scheduled delivery content, delivery time and delivery method as required, and then click the Next button.