How many days in advance will the online reservation number of Shenzhen social security be issued?

Every day 18 hours. Official website, Shenzhen Social Security Bureau, can make an appointment three days in advance and start numbering every day 18; An appointment number can only handle one business. If you can't come after the appointment, please cancel the appointment in time to avoid being limited in the number of appointments. Social insurance is a social and economic system that provides income or compensation for those who lose their ability to work, are temporarily unemployed or suffer losses due to health reasons.