What is the universal driving safety rule when operating a large bus around blind curves and hairpin turns on mountain roads?

1. 'Honk early, keep to the right, and decelerate' (减速、鸣喇叭、靠右行)
2. 'Accelerate, flash high beams, and occupy the center line'
3. 'Shift into neutral, coast freely, and steer close to the left cliff edge'
4. 'Overtake any slower trucks immediately before the curve apex'