According to the regulations of Shanghai Stock Exchange, after opening a special account, the fund cannot buy or sell products with codes starting with 203 (buyout repurchase), A shares, B shares, 100,1/kloc-0 (convertible bonds), and there are no other restrictions at present.
If you already have a shareholder account, you don't need to open a fund account starting with F, you can buy it in a securities stock account.