Thousands of letters keep flashing back

does the subject want to ask "what if thousands of letters keep flashing back"? Restart the phone and clear the cache.

1. restart the phone. The user always flashes back when using Qianxin because of system failure, which can be solved by restarting the mobile phone.

2. Clear the cache. The reason why users keep flashing back when using Qianxin is due to the lack of memory in the mobile phone, which can be solved by cleaning up the temporary data.