what are the proper table manners for eating of chinese food ?

I only know some.
The guests, old people usually seat at first and then the young people. The important people seat in the left side. Try to keep communicating with people around you, but not too much and not too loudly.
If you want to know more, you may find detail information at https://www.travelchinaguide.com/essential/chinese-etiquette/table-manners/. Hope it is useful for you.