Is it true that qq sales groups are all marketing numbers?

It's true. According to the Public Security Administration Punishment Law, the marketing number has a certain commercial purpose and marketing means, and its behavior and content have obvious commercial nature. Qq sales group is not a formal e-commerce trading platform. There is no suitable guarantee for refund, after-sales and payment when shopping in qq sales group. So if you want to buy something, it is recommended to buy it on a platform with this guarantee, or in a physical store.