A food business dealer talks with an exhibitor at the 10th Green Food Fair of China, in Yantai, east China's Shandong province, Oct. 23, 2009. The fair, which kicked off on Friday, attracted about 2,000 food enterprises and more than 1,000 dealers of food and cooking oil business.(Xinhua/Shen Jizhong)

A bunch of sample soy bean plant attracts food business dealers at the 10th Green Food Fair of China, in Yantai, east China's Shandong province, Oct. 23, 2009.(Xinhua/Shen Jizhong)

Food business dealers talk with exhibitors at the 10th Green Food Fair of China, in Yantai, east China's Shandong province, Oct. 23, 2009. (Xinhua/Shen Jizhong)

A visitor tastes sour soup of China's Miao ethnic group at the 10th Green Food Fair of China, in Yantai, east China's Shandong province, Oct. 23, 2009. (Xinhua/Shen Jizhong)