Under GB 7258-2017 safety standards, what should a bus driver do if the pneumatic air pressure warning buzzer sounds and the gauge drops below 0.55 MPa (5.5 bar) while driving?

1. Immediately activate hazard lights, pull over to a safe area, stop the vehicle, and do NOT continue driving until the air brake pressure system is repaired and holds rated pressure
2. Ignore the warning buzzer and drive at top speed to pump the air tanks faster
3. Disconnect the buzzer wire and continue passenger operations normally
4. Pour engine oil into the brake lines while driving