(2) Investment income of the endowment insurance fund;

(3) late fees;

(4) government subsidies, etc. The first is the main source of endowment insurance fund under the current system in China, which is formed by employers and individual employees paying insurance premiums to social insurance agencies on a monthly basis according to the specified salary base and proportion. At present, there are only two kinds of investment income: bank interest and debt interest. The main purpose is to protect the value of the savings fund. Government subsidies are generally only paid when pension funds have policy losses.