First of all, there is nothing wrong with a transaction, that is, someone buys it and someone sells it.

The commonly referred to as "net inflow" and "net outflow" mainly refer to the monitoring of the movements of major funds.

Generally, small and medium-sized retail investors are ignored.

For example, how much a certain stock, a certain fund or a certain sales department (usually judged based on the trading seat number) bought today, minus the amount sold by a certain fund or a certain sales department, is calculated based on this.

The purchases and sales of small retail investors are not counted.