citystr= "<option value='AKU'>Aksu</option>"+
"<option value='AAT'>Altay</option>"+
"<option value='AKA'>Ankang</option>"+
"<option value='AQG'>Anqing</option>"+
"<option value='AOG'>Anshan</option>"+
"<option value='BSD'>Baoshan</option>"+
"<option value='BAV'>Baotou</option>"+
"<option value='BHY'>Beihai</option>"+
"<option value='PEK'>Beijing</option>"+
"<option value='BFU'>Bengbu</option>"+
"<option value='CGQ'>Changchun</option>"+
"<option value='CGD'>Changde</option>"+
"<option value='CSX'>Changsha</option>"+
"<option value='CIH'>Changzhi</option>"+
"<option value='CZX'>Changzhou</option>"+
"<option value='CHG'>Chaoyang</option>"+
"<option value='CTU'>Chengdu</option>"+
"<option value='CIF'>Chifeng</option>"+
"<option value='CKG'>Chongqing</option>"+
"<option value='DLC'>Dalian</option>"+
"<option value='DLU'>Dali</option>"+
"<option value='DDG'>Dandong</option>"+
"<option value='DAT'>Datong</option>"+
"<option value='DAX'>Daxian</option>"+
"<option value='DYG'>Dayong</option>"+
"<option value='DIG'>Diqing</option>"+
"<option value='DOY'>Dongying</option>"+
"<option value='DNH'>Dunhuang</option>"+
"<option value='ENH'>Enshi</option>"+
"<option value='FUG'>Fuyang</option>"+
"<option value='FYN'>Fuyun</option>"+
"<option value='FOC'>Fuzhou</option>"+
"<option value='KOW'>Ganzhou</option>"+
"<option value='GOQ'>Golmud</option>"+
"<option value='GHN'>Guanghan</option>"+
"<option value='CAN'>Guangzhou(Canton)</option>"+
"<option value='KWL'>Guilin</option>"+
"<option value='KWE'>Guiyang</option>"+
"<option value='HAK'>Haikou</option>"+
"<option value='HLD'>Hailar</option>"+
"<option value='HMI'>Hami</option>"+
"<option value='HGH'>Hangzhou</option>"+
"<option value='HZG'>Hanzhong</option>"+
"<option value='HRB'>Harbin</option>"+
"<option value='HFE'>Hefei</option>"+
"<option value='HEK'>Heihe</option>"+
"<option value='HNY'>Hengyang</option>"+
"<option value='HET'>Hohhot</option>"+
"<option value='HTN'>Hotan(Hetian)</option>"+
"<option value='JMU'>Jiamusi</option>"+
"<option value='KNC'>Jian</option>"+
"<option value='JGN'>Jiayuguan</option>"+
"<option value='JIL'>Jilin</option>"+
"<option value='TNA'>Jinan</option>"+
"<option value='JDZ'>Jingdezhen</option>"+
"<option value='JHG'>Jinghong</option>"+
"<option value='JNG'>Jining</option>"+
"<option value='JJN'>Jinjiang</option>"+
"<option value='JNZ'>Jinzhou</option>"+
"<option value='JIU'>Jiujiang</option>"+
"<option value='CHW'>Jiuquan</option>"+
"<option value='JZH'>Jiuzhaigou</option>"+
"<option value='JUZ'>Juzhou</option>"+
"<option value='KRY'>Karamay</option>"+
"<option value='KHG'>Kashgar</option>"+
"<option value='KRL'>Korla</option>"+
"<option value='KMG'>Kunming</option>"+
"<option value='KCA'>Kuqa</option>"+
"<option value='LHW'>Lanzhou</option>"+
"<option value='LXA'>Lhasa</option>"+
"<option value='LYG'>Lianyungang</option>"+
"<option value='LJG'>Lijiang</option>"+
"<option value='LYI'>Linyi</option>"+
"<option value='LZH'>Liuzhou</option>"+
"<option value='LYA'>Luoyang</option>"+
"<option value='LUM'>Luxi</option>"+
"<option value='LZO'>Luzhou</option>"+
"<option value='NZH'>Manzhouli</option>"+
"<option value='MXZ'>Meixian</option>"+
"<option value='MIG'>Mianyang</option>"+
"<option value='MDG'>Mudanjiang</option>"+
"<option value='KHN'>Nanchang</option>"+
"<option value='NAO'>Nanchong</option>"+
"<option value='NKG'>Nanjing</option>"+
"<option value='NNG'>Nanning</option>"+
"<option value='NTG'>Nantong</option>"+
"<option value='NNY'>Nanyang</option>"+
"<option value='NGB'>Ningbo</option>"+
"<option value='IQM'>Qiemo</option>"+
"<option value='TAO'>Qingdao</option>"+
"<option value='IQN'>Qingyang</option>"+
"<option value='SHP'>Qinhuangdao</option>"+
"<option value='NDG'>Qiqihar</option>"+
"<option value='JJN'>Quanzhou</option>"+
"<option value='SYX'>Sanya</option>"+
"<option value='SWA'>Shantou</option>"+
"<option value='SHA'>Shanghai(Hongqiao)</option>"+
"<option value='PVG'>Shanghai(Pudong)</option>"+
"<option value='SHS'>Shashi</option>"+
"<option value='SHE'>Shenyang</option>"+
"<option value='SZX'>Shenzhen</option>"+
"<option value='SJW'>Shijiazhuang</option>"+
"<option value='SYM'>Simao</option>"+
"<option value='SZV'>Suzhou</option>"+
"<option value='TCG'>Tacheng</option>"+
"<option value='TYN'>Taiyuan</option>"+
"<option value='HYN'>Taizhou(Huangyan)</option>"+
"<option value='TSN'>Tianjin</option>"+
"<option value='TNH'>Tonghua</option>"+
"<option value='TGO'>Tongliao</option>"+
"<option value='TEN'>Tongren</option>"+
"<option value='TXN'>Huangshan</option>"+
"<option value='HLH'>Ulanhot</option>"+
"<option value='URC'>Urumqi</option>"+
"<option value='WJD'>Wangjiadun</option>"+
"<option value='WXN'>Wanxian</option>"+
"<option value='WEF'>Weifang</option>"+
"<option value='WEH'>Weihai</option>"+
"<option value='WNZ'>Wenzhou</option>"+
"<option value='WUH'>Wuhan</option>"+
"<option value='WUX'>Wuxi</option>"+
"<option value='WUS'>Wuyishan</option>"+
"<option value='WUZ'>Wuzhou</option>"+
"<option value='XIY'>Xian</option>"+
"<option value='XMN'>Xiamen</option>"+
"<option value='XFN'>Xiangfan</option>"+
"<option value='XIC'>Xichang</option>"+
"<option value='XIL'>Xilinhot</option>"+
"<option value='XNN'>Xining</option>"+
"<option value='XUZ'>Xuzhou</option>"+
"<option value='ENY'>Yanan</option>"+
"<option value='YNZ'>Yancheng</option>"+
"<option value='YNJ'>Yanji</option>"+
"<option value='YNT'>Yantai</option>"+
"<option value='YBP'>Yibin</option>"+
"<option value='YIH'>Yichang</option>"+
"<option value='INC'>Yinchuan</option>"+
"<option value='YIN'>Yining</option>"+
"<option value='YIW'>Yiwu</option>"+
"<option value='UYN'>Yulin</option>"+
"<option value='YCU'>Yuncheng</option>"+
"<option value='DYG'>Zhangjiajie</option>"+
"<option value='ZHA'>Zhanjiang</option>"+
"<option value='ZAT'>Zhaotong</option>"+
"<option value='CGO'>Zhengzhou</option>"+
"<option value='HSN'>Zhoushan</option>"+
"<option value='ZUH'>Zhuhai</option>"+
"<option value='ZYI'>Zunyi</option>";