Why didn't the reserved users receive the reminder for the flash sale event?

Due to WeChat's rule restrictions (users need to interact with the Official Account within 48 hours), users who make early reservations may not receive reminders when the event starts. For better event results, it is recommended to set a reasonable pre - heat period and send official account articles.

User interaction behaviors with the Official Account: Click on official account articles, click on menus, send messages, and newly follow the Official Account.