1. The difference between Harvest Fund CSI 500 etf and Harvest Fund CSI 500 link: ETF is for on-exchange trading and real-time trading; feeder funds are for off-exchange subscription and redemption transactions.

2. Traded open-end index funds, also commonly known as Exchange Traded Funds ("ETF" for short), are a type of fund with variable shares that are listed and traded on the exchange. an open-end fund.

3. A feeder fund refers to investing most of its fund assets in ETFs (i.e. target ETFs) that track the same underlying index, closely tracking the performance of the underlying index, and pursuing the minimization of tracking deviation and tracking error. A fund that operates in an open-ended manner. As an investment method that achieves synchronized growth with the market, index funds are increasingly receiving widespread attention and favor from investors.