rubbers
deodorant
shaving blades
cologne
patience

the only things not available to buy in China are foods that you have learned to love at home..........  agree with the guy above...  patience patience patience.........happy happy happy demeanor would be a great thing to bring too, it just seems to make everything better..............  China is a pretty good place to be!!!!!!!!

like he said, get your shaving cream, razors, deodorant, cologne before you come. Available here, but way pricey. Oh and some cologne is really hard to find (except in HK of course).

I also have never found Fritos here, and tortilla chips and cheese-dip, picante sauce are waaay expensive also !

The usual things I stock up on during my return trips home are:

-Deodorant (no brands here I've ever heard of)

-Ground coffee (I can't stand the instant coffee that's prevalent here)

-Supplements, vitamins, medicine (some things you can get here, some you can't, and some you just don't know the quality/safety of...)

-Clothes and shoes that fit (I'm not a big guy, 173cm 75kg....but nothing here fits me except the oddball XXXL jacket or pair of pants or something from an expensive international brand store...maybe).

-I don't use one....but if you need access to censored websites while you're in China, setup your VPN before you get here.

If you shoe size is more than 44 (EU Size) then bring an extra pair from home

If you are a 6' male, them clothes and enough shoes, is you are short - no problem, other items as per above, you could bring a suitcase full of cheese, so you won't go without and could probably sell it here for big bucks. Lost of things I never found , spices even common ones like cinnamon,vanilla, tomato sauce, fill up on beef before you come- beef is kinda not good.

 If you are female, no idea, maybe bras. i don't think they sell unpadded bras in China.

Bring yourself a stovetop coffee maker. 

passport

Plane ticket

Cash

Underwears

A gun

and the number of your embassy

LOL

1.  Patience;

2.  Civility;

3.  Tolerance;

4.  Charity;

5.  Open Mindedness; and

6.  Ability to endure a different culture.