Under the Pricing Law of the PRC and transport rules, how must ride-hailing platforms and drivers implement pricing policies?

1. They must implement transparent marked pricing (明码标价), explicitly displaying base fares, mileage rates, duration fees, and surge multipliers to passengers before order confirmation
2. They may dynamically change fares at the end of the trip based on driver mood and vehicle brand prestige
3. They are exempt from displaying fare details as long as the total trip cost is below RMB 200
4. They may secretly apply surge pricing without informing passengers until after the trip concludes