Payment period includes deemed payment period and actual payment period. The deemed payment period refers to the continuous working time calculated according to the state regulations before the actual payment period in all the working years of employees.

The state has implemented the retirement pension fund system in state-owned enterprises since June 1986+00. All employees working after June 1986+00 need to sign labor contracts, implement the labor insurance manual system and record individual contributions. The payment period before this can be regarded as payment. However, some local collective enterprises established the old-age insurance system late, and the situation is not uniform.