Area Codes and Postal Codes in China
Beijing Shanghai Tianjin  
Anhui Chongqing Fujian Gansu
Guangdong Guangxi Guizhou Hainan
Hebei Heilongjiang Henan Hubei
Hunan Inner Mongolia Jiangsu Jiangxi
Jilin Liaoning Ningxia Qinghai
Shandong Shanxi; 03... Shanxi; 71... Sichuan
Xinjiang Xizang (Tibet) Yunnan Zhejiang
Hong Kong Macao   Taiwan
via CNPC c.2012