The parcel is sent from abroad to China, and then it does not include domestic customs, customs clearance and customs duties. Idle fish is an idle trading platform App under Alibaba Group. The main function of idle fish is to provide users with a platform service for reselling idle goods, forming an efficient circulation path of one-click resale and online trading. Packages of goods are sent from abroad to China, and then domestic customs, customs clearance and tariffs are not included. Taobao launched a second-hand trading APP, which catered to many buyers' idea of changing "leisure" into "present" and also responded to the call of low-carbon life in society.