Screenshot Hospital Appointment Code sounds like a micro-optimization until you are near Chunxi Road when every crosswalk feels like a sauna.

A colleague from Brazil once ordered 'medium' spice and cried politely in front of coworkers. 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.
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