Photo Elevator Map at Big Stations — Stairs Only Routes Exist

Photo Elevator Map at Big Stations sounds like a micro-optimization until you are at a wet market off Second Ring Road where the auntie remembers your face after visit three.

A colleague from Brazil once stood in pepper steam for twenty minutes because I misread the lunch rush. 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.