BA, BB, BC, BD, BE,
BF, BG, BH, BI, BJ,
BK, BL, BR, BS, BY,
BZ, VR, XS, 3H, 3I, 3J,
 3K, 3L, 3M, 3N, 3O,
3P, 3Q, 3R, 3S, 3S, 3T, 3U

• B1 (Beijing): Beijing Municipality
• B2 (Tianjin/Hebei/Shanxi/Inner Mongolia): North China
• B3 (Jiangsu/Shanxi/Shandong): Jianghuai region
• B4 (Shanghai/Zhejiang/Anhui): East China
• B5 (Fujian/Jiangxi/Zhejiang): Southeast region (Fujian, Jiangxi, Zhejiang)
• B6 (Hubei/Hunan/Henan): Central China
• B7 (Guangdong/Guangxi/Hainan): South China
• B8 (Sichuan/Chongqing/Guizhou/Yunnan): Southwest China
• B9 (Shaanxi/Gansu/Ningxia/Qinghai/Xinjiang): Northwest region
• B0 (Tibet): Tibetan Plateau