One: Open the body. Place the car on the ground and hold it in one hand. Hold the start button on the side of the front wheel with your other hand, and press the front and bottom firmly to open the car. 

Two: Fixed folding links. There is a lock on the other side of the start button. Tighten the lock inwards. It's fixed Three: Adjust the height of the pole. 

There are 3 round holes in the pole. Pull up the rod and adjust it to its own height. Finally, tighten the lock on the pipe. 

Four: Install the handle. Open the lid of the pressure fastener, loosen the screw, and remove a piece of plastic (the plastic piece can be discarded). Then insert the handle tube into it. When both sides are plugged, tighten the compression screw and close the lid of the button.?