I just found an interesting chart. If you want to do business in china u should know where to go to.

China Manufacturing Distribution Breakdown
Electronic Industry: Mainly in Guangdong (33%), the rest in Yangtze River delta, Sichuan, Shaanxi Provinces.
Textile Industry: Mainly in Zhejiang (18%) and Jiangsu (20%), the rest in Fujian, Guangdong, Shandong Provinces.
Leather & Feather: South-East Coastal areas, Hebei, Henan, Chongqing and Ningxia provinces.
Metal Product: Zhejiang, Guangdong, Jiangsu, Shandong, Hebei, Henan provinces.
Glass: More in Hebei, Jiangsu, some in Shandong and Guangdong provinces.
Ceramics: Jingdezhen in Jiangxi provinces
Furniture: Mainly in Guangdong and Hebei province, the rest in Jiangsu, Zhejiang, Shanghai, Chengdu and Beijing.
Construction: More in Shandong province, the rest in Hubei, Henan, Guangdong, Jiangsu, Beijing, Zhejiang.
Household Appliance: Guangdong, Zhejiang, Shandong provinces.
Artware & Stationary & Sporting: Zhejiang, Fujian, Guangdong, Hubei
Papermaking & Printing: Guangdong, Zhejiang, Jiangsu, Shandong, Fujian
Machinery Manufacturing: Dongbei Area, Hunan and Hubei provinces.
Petrochemical Industry: Shandong (32%), Liaoning (21%), Guangdong (15%)
Pharmaceutical Industry: Tianjin city, Xian city in Shanxi province
Food & Beverage: Liaoning, Shandong, Jiangsu, Guangdong, Fujian, Hebei, Henan, Hunan, Hubei, Inner Mongolia
Transportation Equipment:
Motor & Bicycle: Taizhou city in Zhejiang province (40%)
Shipping/Vessel: Yangtze River delta, Pearl River Delta, Bohai Bay Areas
Automobile: Mainly in Jilin, Hubei, Shanghai and Yangtze River delta, the rest in Pearl River Delta, Beijing