1. When using, try to place the center of gravity in the middle of the pneumatic rod to ensure that the pneumatic rod rises and turns lightly and flexibly; office chairs after long use should always check whether the screws on the mechanism are loose, and if there is any looseness, tighten them in time; springs and knobs Whether it is loose or not, the spring should adjust the elastic force according to the user's own body weight, so that the back of the chair can return freely and it is most comfortable to lean against.

2. It is strictly forbidden to sit on the armrests of sofas and office chairs or place heavy objects.