On the fund website, the daily net value will be displayed. If you subtract the net value at the time of purchase from the present value and divide it by the net value at the time of purchase, the percentage you get is the percentage of your profit and loss, which can be multiplied by the principal. Of course, the annual management fee and custody fee of the fund need to be deducted. If you buy a bank card through online banking, you will see your profit and loss fluctuation directly on the bank website.