the Xinjiang Uygur Autonomous Region
Here are the provincial codes:
Beijing 11
Tianjin 12
Hebei Province 13
Shanxi Province 14
Inner Mongolia Autonomous Region 15
Liaoning Province 21
Jilin Province 22
Heilongjiang Province 23
Shanghai 31
Jiangsu Province 32
Zhejiang Province 33
Anhui Province 34
Fujian Province 35
Jiangxi Province 36
Shandong Province 37
Henan Province 41
Hubei Province 42
Hunan Province 43
Guangdong Province 44
Guangxi Zhuang Autonomous Region 45
Hainan Province 46
Chongqing 50
Sichuan Province 51
Guizhou Province 52
Yunnan Province 53
Tibet Autonomous Region 54
Shaanxi Province 61
Gansu Province 62
Qinghai Province 63
Ningxia Hui Autonomous Region 64
Xinjiang Uygur Autonomous Region 65
Taiwan Province 71
Hong Kong Special Administrative Region 81
Macao Special Administrative Region 82