1. First, open the flush website or mobile App to enter the stock market interface. At the top of the market interface, select the "Northbound Capital" option.

2. Secondly, the inflow and outflow of northbound capital can be seen on the northbound capital interface, which is displayed by "net buying" and "net selling".

3. Finally, according to the date, check the northbound capital flow in a specific time period, switch different underlying stocks, and check the northbound capital flow of different stocks.