Why do you want to turn your seat upside down on the high-speed train?

The high-speed train doesn't have to turn around, and there are locomotives at both ends of the train. When they arrive at the station, they can travel in the opposite direction. In order to match this, all the seats in the train can rotate at 180 degrees, and the cushions can be adjusted accordingly. Generally speaking, seats will follow the direction of the train to avoid carsickness.

Because the serial numbers of two or three people will change after the seat is rotated, the high-speed rail will now learn to add numbers and letters on the plane, with A and F in the window position and C and D beside the aisle.

Extended data:

All the seats of the high-speed train can rotate at 180 degrees, and the cushions can be adjusted accordingly. As long as you like and the back row agrees, you can sit up straight or backwards. Asked to turn the seat upside down, maybe the train will turn. Generally speaking, seats will follow the direction of the train to avoid carsickness.

There are two round buttons (possibly on the left or right) on the armrest of your seat. When you press one of them, your body leans back and your backrest tilts accordingly. When you need to restore the original state, press this button, but don't lean back, and the backrest will come back.

The other button is used to lengthen your seat (where your hips sit). Press and hold this button to move your hips forward, and the seat will lengthen forward. I believe you have learned the way to restore the original state.

High-speed railway (referred to as high-speed railway for short) refers to the railway system that the maximum operating speed is not less than 200 km/h through the transformation (linearization and gauge standardization) of the original line, or a new "high-speed line" is specially built to make the operating speed reach at least 250 km/h. High-speed railway not only needs to reach a certain speed standard when the train is running, but also needs the coordinated upgrade of vehicles, tracks and operations.