Northbound funds can be traded in batches. Northbound funds are Shanghai Stock Connect and Shenzhen Stock Connect. It is often seen that the inflow of funds to the north has risen sharply and the outflow has fallen sharply. In a market with a turnover of hundreds of billions, only a few hundred million can lead the trend of the index, which is much lower than the cost of storming large-cap stocks in the past and the effect is better.