The accumulated income of the fund refers to the part that exceeds the initial value of the fund itself in the whole process from the establishment of the fund to the present. More figuratively speaking, the accumulated income of the fund is the sum of all dividends, bonuses, bond interest, spreads between buying and selling securities, deposit interest and other income obtained by the fund investment.

If it is a subscribed fund, and the subscribed fund has always been in your own hands, then the accumulated income of this fund is your personal income.