Welcome to the ranks of posters, colonel.
Yes, Chinese units may move into (occupy) Kwangtung and Burma at any time, with no political consequences.
BoardGameGeek is a good place to upload files for sharing.
There are 5 boxes for units
in AAP40.
In my game the China Box holds Chinese inf, couple of US artillery, a fighter from 2nd Edition A&A, AA50 US fighter (haven’t decided which I like better for Flying Tiger), Ziploc bag (snack size) with all nations roundels, Ziploc bag (snack size) with the cardboard chits (MjIC, MnIC, AB, NB, AAgun), and the bag of dice and chips I never opened (I use my own 3 colors of chips and 9 colors of dice).
Because there are so few Chinese parts, that where the other stuff goes. :-P
Oh I thought you were talking about another kind of Chinese box :-D