?????????“??????” ???

????:????????app:??????????

?????2?????18??? (?? ????)?????????????18????????,??????,??“??????”,???????????????,????????????????????????????“??”????????????,????????,????????

???“???”?????????????????,?????????????????????,?????????????,?50????????????????(?)??????,????????500???,???????1-3?,????????0.3%-0.5%/??????????????????????,?????????????,????????????,?????????????????????,????????,???????

?????,“?????????????”???????????,??????????,???,??20???????(??????????)?????????0.3%/?????,20???????0.5%/???????????????????????????????????????????????

??????????????,????????“?????”?????20????????(?????)???????????????,???????????????20???????????,?????????,????????????????????????????(???) ???????????????????:????