1. Local social security agency: Bring your valid personal identification directly to the local social security agency to print the personal account list of basic old-age insurance and inquire about the payment period of old-age insurance.

2. Social Security official website: Log in to the local social security official website, and you can inquire about the payment of old-age insurance, including the payment period.

3. WeChat official account: Pay attention to the local WeChat official account 12333, and you can inquire about the payment period and details of endowment insurance.

4. Alipay: Through Alipay city service, you can enter the social security column and inquire about the payment information of endowment insurance.

5. Customer service phone number: directly dial 12333, transfer to manual service, provide identity information verification, and apply for inquiry about how many years the endowment insurance has been paid, and the customer service will tell you.