Best way to prevent from pickpocketing and theft during the Guangzhou trip.

I will be going on my first trip to Guanghzho and China. We will be staying with my Aunt and cousins. While shopping and site seeing, would it be wise to wear a money belt with my spending money or carry small amounts of money in various pockets? Should I carry ID around with me - passport or drivers license? My Chinese and Mandarin is very minimal. Any suggestions would be appreciated.