A visitor tries a tap device which is able to remove pesticide residues on vegetable and fruites at the 2012 Beijing Taiwan Trade Fair at the National Agriculture Exhibition Center in Beijing, capital of China, Nov. 22, 2012. The four-day event kicked off here Wednesday, involving over 200 enterprises in realm of high technology, environmental protection, cultural innovation, sport and so on. [Xinhua]

Staff members display bottled products at the 2012 Beijing Taiwan Trade Fair at the National Agriculture Exhibition Center in Beijing, capital of China, Nov. 22, 2012. The four-day event kicked off here Wednesday, involving over 200 enterprises in realm of high technology, environmental protection, cultural innovation, sport and so on. [Xinhua]

A staff member displays packaged food at the 2012 Beijing Taiwan Trade Fair at the National Agriculture Exhibition Center in Beijing, capital of China, Nov. 22, 2012. The four-day event kicked off here Wednesday, involving over 200 enterprises in realm of high technology, environmental protection, cultural innovation, sport and so on. [Xinhua]