Why did my social security contribution base drop?

Hello! The reasons for the low payment base are as follows: if your company pays in, the social security payment base is determined according to your total pre-tax income from June last year to June this year. The total income before tax divided by 12 is the new payment base, which is adjusted every July. If your contribution base becomes lower, it means that your total pre-tax income in the previous year has decreased, and you need to work harder to increase your income.