Will Shenzhen automatically deduct social security on the last day of February 28?

Shenzhen automatically deducted social security on the last day of February 28th. According to the relevant information, the tax bureau will deduct the expenses from the company's account from the 22nd to the end of the month, and the flexible employees who successfully join the insurance before the 20th of each month will be deducted from the 22nd to the end of the month, and then deducted from the 22nd to the end of the month.