The mission, for a limited period of time (one to three days), recommended only a small number of selected merchants for a single product, so that merchants' discounts in a wide range of discount messages were shown to be impressive and centralized in the face of consumers. However, the network has only a few days to buy time, and to obtain the preferential products offered by the merchants, it needs to be more sensitive and to reach a minimum number of people before it can be achieved. Time is limited, and in order not to miss the product you like, it is important that good news be publicized, that the internet’s well-developed social networks, that information about commodities can spread rapidly, that is, that merchants, the power of the internet, that the first few days allow a large number of interested consumers to get information about the commodity, and that, once a deal has been made, the buyer’s receipt can be accurately calculated; and that, even if it is not, the merchants are given free advertising. For business, it's a zero-cost cooperation model. It's really simple. Try it