Here are the steps:

1. Remove all tray parts from the box, including the tray top, connecting tube, wheel base, and castor wheels.

2. Insert the five castor wheels into the wheel base.

3. Unscrew the knob on the connecting tube and push out the internal tube. Tighten the knob afterwards.

4. Place the connecting tube (with the wider end) firmly into the wheel base.

5. Place the wheel base with the wheels and inserted connecting tube on the floor, and then put the tray top on top of the connecting tube.

6. You are now ready to go! Enjoy!

P.S. If any accessories were delivered with the tray, please put them on the tray top.
Before placing the B holder or D holder, make sure to remove the silicon ring from the intended hole.