Enter Qingyang Palace Side Gate — Front Gate Selfie Queue

Enter Qingyang Palace Side Gate sounds like a micro-optimization until you are at People's Park teahouse where mahjong soundtracks your afternoon.

The security guard who knows everyone's delivery habits once got locked out because the fingerprint reader hates sweaty thumbs. 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.