Yes, ETF funds can only be traded by opening the floor fund account (generally, the floor fund account will be opened at the same time as the stock account is opened, or it can be opened if it is not opened). ETF fund is a kind of fund, which trades in the on-site market, that is, the stock market, and trades at the real-time market price.
ETF funds invest in a specific index and buy some or all of the constituent stocks in the index in order to obtain the same income as the index.