There are two types of enterprise annuity plans: defined benefit annuity (abbreviated as DB) and defined contribution annuity (abbreviated as DC). The management modes of payment and treatment payment are different, and the investment risks faced by the annuity funds formed by them are also different. Defined benefit annuity (DB) refers to an enterprise's agreement on the pension standard for its employees after their future retirement according to their salary level, working years and contribution to the enterprise, that is, the pension that the enterprise needs to pay. Based on this, the enterprise determines the required annual payment and bears all the investment risks of annuity asset management. Defined contribution annuity (DC) means that employers and employees pay insurance premiums in a certain proportion on a regular basis by establishing personal accounts, and the level of employees' pension depends on the accumulation scale of funds in the accounts and their investment income. Retirement pension can be withdrawn by employees in one lump sum or by installments until their personal account balance is zero. For the standard defined contribution annuity, employees make their own investment decisions and bear the investment risks of their personal account funds. However, in practice, the specific asset management of annuity accounts is often entrusted to professional institutions, and the owner of annuity accounts only has the right to choose asset management institutions or portfolio varieties with certain risk-return characteristics.