It is better to buy CSI 500 index fund, because historically, CSI 500 index is stronger than CSI 300 index, and investors can get higher returns by buying CSI 500 index fund, but historical trend does not represent future trend, so investors need to choose CSI 500 index fund or CSI 300 index according to valuation and location.

The CSI 500 Index Fund tracks the CSI 500 Index and selects all or part of its constituent stocks to form a portfolio in order to obtain the same income as the index. The Shanghai and Shenzhen 300 Index Fund tracks the Shanghai and Shenzhen 300 Index and selects all or part of its constituent stocks to form a portfolio in order to obtain the same income as the index. Generally speaking, CSI 500 Index Fund and CSI 300 Index Fund are more suitable as the targets of investment funds, because historically, they have a higher probability of gaining income.