I don't know a thing about China visa stuff, but save your baggage room on clothes unless you are a big person, there are plenty of cheap clothes there you can select from that will be comfortable, affordable, and fit. Think about things you can't get there. I came to Korea with things like big towels, books, more books, and music, plus personal stuff. Maybe check out some ex-pat boards on living and working in China not related to a finance site would be best. Best of luck to you.

Charm~