1. The chair must be able to move freely. It is best to choose a chair with wheels, and the wheels should be made of different materials according to the softness and hardness of the floor.

2. The chair must not have a bad design that hooks clothes or hinders work. If you use a chair with armrests, you need to choose a material with a good touch on the surface of the armrest.

3. All adjustment devices should be simple and easy to operate.