????:1??????????:100?4?????

2???app??

3?????????

4????????

5???????????

??,??12306??“?????????”,???,????????????????????????????!

??,????????????

????????,??,???????????????????????,??,12306??,???,??????????????,???

??,???

???????,???????????,????????3????????????,??????????????1?????????5???“??+??????”????,??????????????????,?????????,??9????????????????????????,??????????,???,???

??????,??????

??????,????????????????24???????????????,???????????????????????,5??,?????????,????,?????????????

???????????????????????????,???????!

(?????? ?????????????????????? ???? ???? ??????????????) ??????????????????:???????????