That's ordinary mail, and the price is relatively cheap. If you take the courier company, you will arrive within 3 days. . .

But books are generally heavy, such as 1kg books. If you send it by express, it will probably take 15 ~ 20 yuan. In this way, if the price of books you buy online is less than 65,438+000, the money is obviously not enough to be your motivation to buy books online. . . .

Surface mail is relatively cheap, maybe a few dollars, but the postal route has changed, and the delay is long and unsafe, so it is impossible to track the transportation of goods, but buying books is really more affordable. Unless the book you buy is particularly valuable, only surface mail can ensure that buying books online is more affordable than buying them yourself. Of course, books that are particularly important to you are an exception. )