{"error_msg":"","returncode":"1","cityTrain":[{"city_name":"北京","first_code":"bjb","generatedId":0,"id":"VAP","py_code":"Beijingbei","value":"北京北"},{"city_name":"北京","first_code":"bjd","generatedId":0,"id":"BOP","py_code":"Beijingdong","value":"北京东"}