You should take some time preparing for your pack for your China trip since China is possibly a big difference from your resident country. Beside the normal pack list for a trip, you are advised to focused on the following China pack tips:
Tip 1: Take a Chinese Phrasebook
There is such a wide varity of Mandarin phrasebooks on the market. You may choose a useful Chinese phrasebook for Chinese travelers. If you meet any difficulty on your trip without any English speaking people around, you can turn to your Chinese phrasebook for help.

Tip 2: Bring some cash on hand
Cash is widely used in China though credit cards have become more and more popular. Some restaurants and stores don't accept credit cards. If you travel to some remote area, you will find paying cash is the only way of local payment.

Tip 3: Take Hand Sanitizer & Wet Wiper
It is very useful to have hand sanitizers and wet wipers on hand to clean your hands after dining, going to toilet or traveling in some crowded public places. It is advisable to carry alcohol pads to clean the ones in the restaurants.

Tip 4: Prepare for a Electrical Converter and Adapter Plugs 
China uses generally 220V, 50HZ, AC (Hong Kong is 200V; Taiwan is 110V). A standard socket in China has two pins on the upper part and earthed three pins on the lower part. You may buy a portable plug adaptor at your home country or here in China. Some of your hotels in China offer free use of plug adaptors. 

 

Tip 5: Do not Drink the Tap Water in China
Some hotels provide bottled water for free, use that even for brushing your teeth. Buy bottled water, or boil your own using the electric water heater found in every hotel room.

Tip 6: Bring Toilet Paper
Always bring tolet paper with you since most of the restrooms in China don't offer toilet paper except hotels. 

Tip 7: Prepare for a photocopy of China Tourist Visa
Always prepare for a photocopy of your China tourist visa in case you lose your passport.

Tip 8: Always Carry one of the Hotel's Business Cards
Most hotels in China provide business cards (contact cards on the front desk). Please always take it for an easy return to the hotel.

Tip 9: Don't Forget to Ask for a Local Tourist Map from your Hotel
Most hotels in China provide free tourist maps. These maps are basically more informative than the maps in your China guidebook. But usually your hotel doesn't put them on the hotel front, you have to ask for it!