1. Open the folding scooter.
First, release the lever at the front left of the pedal.
Then, press down the folding locking lever on the right side of the pedal with one hand, and lift up the handle with the other hand, lock the lever on the left side, and fix the handle.

 2. Adjust the handle.
Keep the front wheel and pedal in the same line, look down over the handle, and check whether the horizontal tube of the handle is perpendicular to the front wheel of the pedal.
If it is not vertical, you can use a hex wrench to loosen the two screws at the bottom of the direction pipe, readjust the position of the handle, and then tighten the screws.
Then check the height of the handle. Stand on the ground on both sides of the pedal, in the middle of the pedal. Bend your arms slightly. The handle should be at the same height as the hip.
If the height is not right, you can adjust the height of the handle, turn on the brake switch at the top of the direction tube, press and hold the spring button, adjust the height, and then lock the switch.

 3. Check the steering system and wheels.
First, check the steering system, hold the handle and move the front of the car forward and backward. If there is any looseness between the handle and the wheel, it is necessary to tighten the nut at the locking ring at the bottom of the steering pipe. Please note that the tightness should be appropriate, and if it is too tight, it will not be able to turn.If there is any looseness between the handle and the pedal, tighten the locking system and the screws below. Then, put the scooter upside down, check the wheels, fix the scooter, and try to shake the wheels left and right.
If the wheel shakes badly, you can use a hexagon wrench to tighten the screws on both sides of the wheel.