Late Night Museum Queue: Bring Layer, AC Cold

Late Night Museum Queue: Bring Layer, AC Cold sounds like a micro-optimization until you are on Line 1 when the carriage smells faintly of hotpot from someone's lunch box.

A friend visiting from Shanghai who thought Chengdu was 'mild' once showed up to PSB registration without the landlord and got the slow queue. 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.

Not gospel.