It is true that Taobao and Meituan bought masks. Before placing an order, you must know whether the mask manufacturer is the flagship store of the mask manufacturer or whether there is a formal commodity inspection certificate. Or a merchant with a quality certificate. The masks sold on Taobao are genuine licensed products, which can guarantee the inspection certificate of AQSIQ or can be packaged separately. If there is any problem, you can return it for seven days without reason.