The latest net value is the total assets divided by the fund share after the daily closing, which is also the reference net value for your redemption of the fund. Cumulative net value refers to the accumulation of assets (excluding dividends) since the establishment of the fund, which is mainly used to calculate the annual rate of return.
When you redeem the fund, you only get the difference, that is, the difference between your selling price and your buying price. There is no concept of interest. This algorithm does not include fund dividends during the period.