GOJANE SW-YZ-03 Installation guide

I have analyzed the provided user manual for a chair. This document contains detailed instructions for assembly, including the use of a hex key, and also some partial tightening procedures. I'm now ready to answer your questions about the chair.
What should I use to tighten the screws initially?

Should all screws be fully tightened at first?

When should all screws be fully tightened?

Please tighten 70% with hex key.

DO NOT fully tighten.

Please ensure all screws are fully

tightened before using this chair.