Table A1.

All cities and their code numbers.

Sanmenxia(1)	Dongying(2)	Linyi(3)	Bozhou(4)
Baoding(5)	Xinyang(6)	Lu’an(7)	Nanjing(8)
Nantong(9)	Nanyang(10)	Hefei(11)	Zhoukou(12)
Tangshan(13)	Shangqiu(14)	Weihai(15)	Anqing(16)
Anyang(17)	Xuancheng(18)	Suzhou(19)	Suqian(20)
Changzhou(21)	Pingdingshan(22)	Langfang(23)	Kaifeng(24)
Zhangjiakou(25)	Xuzhou(26)	Dezhou(27)	Yangzhou(28)
Chengde(29)	Xinxiang(30)	Wuxi(31)	Rizhao(32)
Zaozhuang(33)	Chizhou(34)	Cangzhou(35)	Jiyuan(36)
Taian(37)	Taizhou(38)	Luoyang(39)	Jinan(40)
Jining(41)	Zibo(42)	Huaibei(43)	Huainan(44)
Huai’an(45)	Chuzhou(46)	Binzhou(47)	Luohe(48)
Weifang(49)	Puyang(50)	Yantai(51)	Jiaozuo(52)
Yancheng(53)	Shijiazhuang(54)	Qinhuangdao(55)	Liaocheng(56)
Wuhu(57)	Suzhou(58)	Heze(59)	Bengbu(60)
Hengshui(61)	Xuchang(62)	Lianyungang(63)	Xingtai(64)
Handan(65)	Zhengzhou(66)	Tongling(67)	Zhenjiang(68)
Fuyang(69)	Qingdao(70)	Ma’anshan(71)	Zhumadian(72)
Hebi(73)