Index funds can only make money by buying at a low price and selling at a high price. The fund mainly earns the bid-ask price difference, and only by raising the fund price can it gain income. The rise and fall of the fund is determined by the investment target. When the investment target goes up, the fund goes up, and when the investment target goes down, the fund goes down.

Fund income = (current net value-net value at the time of purchase) * fund share handling fee. Fund income does not need to be calculated manually by investors, and will be directly displayed in the investor's account.