Why can't Luzhou Social Security choose files?

According to the regulations of Luzhou Social Security Bureau, the annual social security payment time of Luzhou Social Security Bureau is 1+0 to February 8. If you don't choose the social security grade during this period, you need to wait until the next year's payment time to choose the file.

Social security file selection refers to the behavior that workers choose the corresponding social insurance payment grade according to their actual salary and welfare level when they participate in social insurance.