1. On an Honor phone, I used Phone Manager to delete DingTalk’s files and data (checking all options before deletion), as shown in Figure 1.

2. Opening DingTalk resulted in a black screen, or it remained stuck on the startup screen (displaying only the DingTalk logo), as shown in Figure 2.

3. I also used Phone Manager to delete all files and data for Alipay and WeChat, and both apps still launched normally. With no other options left, I finally uninstalled DingTalk and reinstalled it, which allowed DingTalk to start up successfully.
