The below useful links are for visitors finding information on China trade.

China Trade Net
China Export Commodities Fair
CECF
ChinaMarket
Chinabidding.com
Chinamet.com
China Trade World
China Business Guide
China Business Info
China Gateway
China Trade Vista
Chinatrade.com
China Products.com
Hong Kong Trade Development Council
Macua Trade & Investment Promotion Institute

If you would like to look for information on China investment opportunities and laws and regulations, the below websites may be useful.

China FDI
China International Fair for Investment and Trade
Chinainvest
Business-China.com
Shanghai Foreign Investment Service Centre
China-Window.com