Backup WeChat Before Phone Change — Chat History Vanishes

Backup WeChat Before Phone Change sounds like a micro-optimization until you are on Line 1 when the carriage smells faintly of hotpot from someone's lunch box.

A student I met at a language exchange once forgot to screenshot the QR code and became that person at the gate. The fix took less time than telling the story.

Try this once: write the rule on your phone lock screen for three days. If it survives, it is yours.

Works for me in Chengdu humidity.