DO use both hands when presenting and receiving business cards.
DON'T write on the business card unless you are told to do so.
DON'T immediately put the card away in your pocket or bag. This can be considered rude, so hang on to the card for a little while before putting it away.
DO address a business associate with their professional title. This shows respect.
DO arrive to meetings early or on time. Punctuality is very important in Chinese culture.