Guangzhou Hotels
I live in Guangzhou and would recommend the Garden Hotel over the China Hotel although both are extremely expensive during the trade fair.
The Garden is a better area as far as nightlife, restaurants, ect. and they have an airport bus that goes directly to the hotel from Baiyun Airport. The only bad part about the Garden is that the subway is not that close but there are tons of busses and taxis cost about 2 bucks to drive from the Garden to the trade fair area.
If you come from Hong Kong and take the train I'd recommend the Tianlun Hotel near the East Train Station which is in the "newer" area of Guangzhou.