Your wealth management product should be a fund. The first thing you have to say is that the net value of a fund is the market price of a certain fund on that day. The net fund value multiplied by the share is equal to the market value of the fund, and then the redemption fee (market value multiplied by 0.005) is the current income of the fund. The share is the principal minus the handling fee (principal multiplied by 0.0 15= handling fee) divided by the market price on the purchase date.

Please adopt it if it helps.