If the second-hand books of college students are returned through the recycling platform, there is no postage. According to the query of the public network, there is no postage if the second-hand book recycling platform for college students returns the goods. If the returned books are due to quality problems, they can return them for free, and Xueant.com will bear the postage. The standard of postage is usually calculated according to the type, weight, size, mailing destination and other factors.