Beijing: Beijing Capital Airport PEK；; Nanyuan NAY

Tianjin: TSN Binhai

Hebei: Shijiazhuang SJW；; ; Qinhuangdao SHP

Shanxi: Taiyuan TYN；; ; Datong DTA；; Changzhi CIH

Inner Mongolia: Hohhot HET；; Baotou BAV；; ; Ulanhot HLH；; ; Haila HLD；; Xilinxil cif Chifeng; ; Tongliao TGO；; ; Wuhai WUA

Eastern China

Shandong: Jinan TNA；; Weihai WEH；; ; Qingdao pottery; ; Weifang WEF；; ; Yantai ynt；; ; Linyi LYI；; Surabaya submarine; ; Jining TNB

Jiangxi: Nanchang KHN；; ; Jiujiang JIU；; ; Jingdejdz Ganzhou KOW；; ; Huangshan TXN；; ; Hefei hefei; Anqing AQG；; ; Fuyang fig

Shanghai: Hongqiao Sha; ; PVG Pudong (these two are airports)

Zhejiang: Hangzhou HGH；; Wenzhou WNZ；; ; Zhoushan HSN；; ; Ningbo NGB；; ; Yiwu yiw; Huangyan HYN；; ; Quzhou JUZ

Suzhou: Wuxi WUX; Nanjing NKG；; ; Xuzhou XUZ；; Lianyungang LYG；; ; Yancheng YNZ；; Changzhou CZX；; Nantong NTG

Fujian: Xiamen XMN；; ; Fuzhou FOC；; ; Gold; Jiang Jin; Wuyishan WUS

Central and southern China

Guangdong: Guangzhou can; ; Meizhou MXZ；; Zhuhai ZUH；; Shantou southwest aluminum; ; Shenzhen SZX；; Zhanjiang gate

Hainan: Haikou HAK；; ; Sanya SYX

Henan: Zhengzhou CGO；; ; Luoyang LTA；; Nanyang NNY

Hubei: WUH；; Anwu; Jingzhou SHS；; Xiangfan XFN；; ; Yichang yin; ; Enhenshi

Hunan: Zhangjiajie DYG；; ; Changsha CSX；; ; Changde CGD；; ; Hengyang HNY

Guangxi: Nanning NNG；; ; Guilin KWL；; ; Beihai BHY；; ; Liuzhou LZH；; ; Wuzhou YUZ

southwestward

Sichuan: Chengdu CTU；; ; Mianyang MIG; ; Yibin Yibin; Luzhou LZO；; ; Jiuzhaigou JAH；; Panzhihua PZI；; ; Xichang XIC；; ; Wanxian WXN；; Daxian Dax; ; Nanchong NAO；; ; Liang ping BPX；; ; Guanghan GHX

Chongqing: Chongqing CKG

Guizhou: KWE；; , Guiyang; Tongren ten; ; Zunyi ZYI

Yunnan: Kunming KMG；; ; Lijiang LJG；; ; Xishuangbanna JHG；; ; Dali Dali; Mangshi LUM；; Di Qing digs; ; Simao Simao; Baoshan BSD；; Zhaotong ZAT；; ;

Tibet: lhasa, Lhasa; Changdu BDU

the Northeast area

Heilongjiang: Harbin HRB；; ; Qiqihar NDG；; ; Mudanjiang Millennium Development Goals; ; HEK black market; ; Jiamusi JMU；; ;

Jilin: Changchun CGQ；; ; Yanji YNJ；; Jilin JIL

Liaoning: Dalian DLC；; Shenyang Society; ; Mianzhou JNZ；; Dandong DDG；; ; CHG Chaoyang

northwest area

Shaanxi: xisia; ; Hanzhong HZG；; ; Yan 'an ENY；; ; Ankang is also known as Ankang; ; UYN Yulin

Gansu: Lanzhou LHW；; ; Dunhuang DNH；; ; Jiayuguan JGN；; ; Qingyang IQN；; ; Xining XNN

Qinghai: Gemur ·GQQ；; ; Yinchuan company

Xinjiang: Urumchi URC；; Hotan Hotan; Yining yin; ; Karamay KRY；; ; Tacheng TCG；; ; Altay Altay; Aksaku; Korla, Korla; Kuqa Kuqa; Kashgar KHG；; ; At the end of IQM; ; Hami NKI；; ; Fuyun FYN

It seems that the code of two words is pinyin. .......