{"text_format":"3","workbook":"xlsx","n_sheets":2,"sheets":["Sheet1","Sheet2"],"not_rendered":{"defined_names":1},"read":"whole","date_system":"1900"}

{"sheet":"Sheet1","index":0,"n_rows":2,"n_cols":5,"rows_kept":2}
["name（Name，style：string，required）","id_card（ID Number，style：string，required）","phone（Phone Number，style：string，required）","app_time(Retrospective Time， style：Date，required）","overdue(0:not overdue; 1:overdue, style:string, optional)"]
["demo","3271061511790009","628900000000","2019-01-04",0]

{"sheet":"Sheet2","index":1,"n_rows":7,"n_cols":4,"rows_kept":7,"merged":[[6,0,6,3]]}
["Title","Meaning","Style","required/optional"]
["name","Name","string","required"]
["id_card","ID Number","string","required"]
["phone","Phone Number","string","required"]
["app_time","Retrospective Time","Date","required"]
["overdue","Whether overdue","string","optional"]
["Titles must be in this order！！！"]