A-share etf refers to ETF fund: it refers to a transactional open index fund, which is publicly listed on the exchange, and the stocks it invests in are copied according to an index component it tracks. That is, the proportion of all stocks held by the fund is basically the same as that of the constituent stocks of the tracking index. Generally speaking, more than 90% of the assets of ETF funds must be invested in the constituent stocks of its tracking index.