Pack Poncho for Bamboo Sea — Umbrellas Catch Trees

Pack Poncho for Bamboo Sea 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.

Your mileage may vary.