When do new employees in Shenzhen buy social security?

1. According to the Shenzhen Labor Law, new employees must buy social security as soon as they join the company.

2. If employees join the company after 19 in the current month, they can't buy the social security of the current month, because Shenzhen Social Security will deduct money on 19-20 every month, and they can buy the social security of the current month if they join the company before 19;

3. At this stage, Shenzhen stipulates that social security must be purchased based on 1808.

Hope to adopt, please give points,