1. Pay-as-you-go: In this mode, the endowment insurance fund is raised according to the current needs, that is, the current income is used to pay the current expenses.

2. Complete accumulation mode: In this mode, all the old-age insurance premiums paid by workers during their employment are deposited into personal accounts, and the return on investment is paid to workers by the fund in the form of annuities every month after retirement.

3. Partial accumulation: this is a combination of pay-as-you-go and complete accumulation, that is, the endowment insurance premiums collected in the current period have a certain reserve under the premise of meeting the expenditure demand in a certain period.