replace the bolt and spring for A1 scooter

1.use the Inside hexagon screwdriver to take the screw out,
2.use a blunt screwdriver to get the bolt out, (need to adjust the spring turn out, not obstruct the bolt out)
3.put the new spring inside, and push the new bolt inside, need to control the spring not obstruct the bolt in.
4.get the screw in of red part.