This website sells only one product each day, without预告ing what will be sold the next day or disclosing the inventory for the day. Once it's sold out, the sale stops. An interesting icon also appears on the webpage: "购OUT". Sometimes, the site sells a pocket with a question mark drawn on it for just 1 dollar (of course, you still have to pay the shipping fee), but you might not know what's inside until you receive it, giving it a bit of a Santa Claus feel, hehe. Of course, another point is that the items on this website are all relatively novel, and it's rumored that they are used for promotional purposes by manufacturers, which explains why the prices are always very low.