Turn left and add a straight road. Can the through train behind the vehicle to be transferred enter the intersection through the tunnel? Is it illegal?

According to the road traffic law. It is illegal to drive on the road.

You can't compress lines at intersections. If you drive across the road, it is equivalent to compacting the line. If you press the solid line, it is a traffic violation, and 3 points will be deducted. There may be a fine of 100-200 in some areas.

There are thousands of roads, and safety comes first. Please obey the traffic rules when driving.