How does Beijing social security change the declared salary?

You can declare your salary again in the declaration month, log on to the online social security service platform, and click the declaration business management to declare the average monthly salary income of employees in the previous year. Enter the name and ID number of the person whose base number you want to change, and enter the change base number. If it is not the declaration date, you need to bring the employee's salary table of the previous year, fill in the change base table, and bring the official seal to the social security center window to handle the business on the spot.

Further reading: How to buy insurance, which is good, and teach you how to avoid these "pits" of insurance.