Haveyoueverdreamedaboutsendingalettertoyourselforyourfr...
問題詳情：Haveyoueverdreamedaboutsendingalettertoyourselforyourfriendsinthefuture?Whileexpressmail(快遞)isafastwaytosendyourletters,thereisanothertypeofmailappearinginChinaasanewbusiness—futuremail.“T...