0 yuan shopping is a marketing method, which is not a real zero-cost exchange for goods by consumers, but various forms of so-called 0 yuan shopping goods, such as pre-charging, equivalent coupons and so on.

"Zero-yuan purchase" refers to an activity carried out by merchants for promotion, such as "zero-yuan purchase of mobile phones". Although mobile phones don't cost money, they can only be recharged with the activities of a certain operator.