What is the correct steering technique and spatial awareness required when reversing an articulated tractor-semi-trailer combination (半挂车倒车) into a loading bay?

1. Turn the steering wheel in the direction OPPOSITE to where the trailer tail needs to go initially to initiate trailer articulation, then counter-steer to track and follow
2. Turn the steering wheel in the exact same direction as a standard rigid passenger car throughout the maneuver
3. Always reverse at maximum throttle while relying exclusively on the central interior rearview mirror
4. Disconnect the air brake lines before reversing so the trailer wheels can freewheel