What is the standard service procedure when a boarding passenger carries heavy luggage that needs to be placed in the trunk?

1. Remain seated, pop the trunk remotely, and honk the horn to signal the passenger to load it themselves
2. Get out of the vehicle, open the trunk, actively assist the passenger in loading and arranging luggage safely, and securely latch the trunk lid
3. Charge an extra luggage handling fee of RMB 20 before opening the trunk
4. Instruct the passenger to squeeze all heavy suitcases onto the rear passenger seat