goods return is a process in which a manufacturer (or a first-class wholesaler) spreads a new product to a terminal (or a second-class wholesaler), and the terminal (or a second batch) sells the goods and then restockes them.

returning goods is the beginning of a virtuous circle of market development or new product promotion. If returning goods fails, it will be extremely difficult to distribute goods in the second round. Many people believe that "sales volume is the last word". In fact, sales volume without returning goods is terrible.

because there is no return of goods after distribution, the so-called "sales volume" is just the exhibits on the shelves and the pressed goods in the warehouse. If the "exhibits" and "pressed goods" are not sold, the terminal (or the second batch) will not purchase goods again. When promoting new products, many manufacturers often declare success prematurely, which is to mistake channel inventory for sales.

the market originated from the ancient name of the place where people traded at a fixed time or place, which refers to the place where buyers and sellers traded. Up to now, the market has two meanings, one is the trading place, such as traditional market, stock market and futures market, and the other is the general name of trading behavior.

that is, the word market not only refers to trading places, but also includes all trading behaviors. Therefore, when talking about the size of the market, it not only refers to the size of the place, but also includes whether the consumption behavior is active. In a broad sense, all relations of property rights transfer and exchange can become markets.