Etf Linked Fund and fof are both funds, and fof can invest in etf Linked Fund. ETF-linked fund, also known as shadow fund and replication fund, refers to an open-end fund that invests most of the fund assets in ETFs that track the same underlying index, closely tracks the performance of the underlying index, pursues the minimization of tracking deviation and tracking error, adopts an open operation mode, and can be purchased and redeemed off-site.

Fund-in-Fund (FOF) refers to the fund that invests in other securities investment funds, and its portfolio consists of other funds.