Department of Insurance noun. Means within the agreed number of years or his life, a series of periodic payments amount enjoyed. Payments may be fixed, or may be non-fixed payments. Fixed annuities have a fixed rate of return, rather than a fixed annuity with the support behind assets fluctuate. National pension is a kind of insurance in order to protect citizens in old age or retirement system of economic life, often including basic pension and the additional pension in two ways: basic pension is to protect all citizens due to old age, permanent disability and survivor's economic life, with a fixed monthly payment amount way to maintain their basic survival, which were issued to all the people, including the elderly pension of public attention, which belong to this. Additional pension is to ensure protection of workers in economic life after retirement, that is, after his retirement in addition to please receive basic pension outside, you can still receive additional annuities.