When driving a passenger car onto an expressway via an on-ramp, what is the proper procedure for merging into the through-traffic carriageway?

1. Drive directly across the solid dividing line at ramp speed (30 km/h) into the through lanes
2. Accelerate in the acceleration lane (加速车道) to a speed of at least 60 km/h, activate left turn signal, check mirrors and blind spots, and merge into the adjacent travel lane when safe without obstructing traffic
3. Stop at the beginning of the through lane and wait for all cars to pass
4. Sound horn loudly to force expressway through traffic to yield