Shanghai Office Chair Installation

For office chair installation in Shanghai, you can refer to the following installation steps for a conventional five-star-base office chair:

1. Install the five-star base and wheels
   The five-star base is the supporting structure of the office chair. The wheels need to be inserted into the holes of the five-star base. Some wheels can be inserted by directly pressing hard, while others need to be screwed in by rotating. Ensure that the wheels are tightly connected to the five-star base during installation to avoid looseness.

2. Install the gas lift cap and gas lift
   Turn over the five-star base with the wheels installed so that the central hole faces upwards. The gas lift is the core component for adjusting the seat height. Before installation, remove the protective cap at the top of the gas lift, and then vertically insert the gas lift into the central hole of the five-star base, ensuring that the bottom of the gas lift is fully embedded.

3. Install the seat base
   Place the seat cushion flat on a clean floor to avoid scratching the surface. The seat base is usually fixed to the bottom of the seat cushion with screws. During installation, pay attention to the direction of the seat base (such as front-back or left-right markings), and use the matching screws to tighten them to ensure a firm connection between the seat base and the seat cushion.

4. Install the gas lift and seat cushion
   Align the seat cushion (with the seat base already installed) with the top of the gas lift and slowly press down to insert the gas lift into the hole of the seat base. Keep the gas lift vertical during this step to avoid tilting, which can cause the seat to be unstable. After insertion, gently shake the seat cushion to confirm that the connection is not loose.

5. Install the armrests
   According to the design of the armrests (such as fixed or adjustable), align them with the installation holes on both sides of the seat cushion. Pay attention to the front-back direction of the armrests (usually lower in the front and higher in the back) during installation. Use screws to initially fix them, but do not fully tighten them to facilitate subsequent adjustment of the backrest position.

6. Install the backrest
   Place the backrest on the seat cushion and align the connection holes of the backrest and the armrests. First, install the screws on both sides at the bottom of the backrest (also do not tighten them fully for now), and then lift the backrest to install the top screws. After adjusting the angle of the backrest, fully tighten all the screws (including those of the armrests) to ensure structural stability.

7. Final touches
   Check that all screws are tightened to avoid omissions. Some office chairs are equipped with armrest decorative caps, which need to be installed last to cover the screw holes and enhance the aesthetics. After installation, gently shake the chair to confirm that there are no abnormal noises or looseness before use.

Precautions:

• Clean the floor before installation to avoid losing small parts.
• Be careful with the force when using tools (such as screwdrivers) to prevent scratching the chair surface.
• If the gas lift cannot be inserted or the chair is tilted, check whether the directions of the components are correct.