If your classmate is engaged in this industry, you can get a commission. If you buy a fund, you can quit, but according to the different trading patterns of the fund, some can quit at any time, and some must follow certain trading patterns.

The subscription and redemption of the fund follow the principle of "unknown price", that is, the purchase and redemption are based on the net asset value of the fund shares after the closing of the application date to calculate the amount of the fund shares bought or sold.