What does social security mean when it shows 123 months

Continuous length of service. A permanent employee who was still a state-owned unit at the time of the introduction of the individual contribution system for pension insurance in a foreign province has 123 months of continuous service, calculated in accordance with national regulations before the introduction of the individual contribution system for pension insurance in the locality. Social insurance is a social and economic system that provides income or compensation for the population that is incapacitated, temporarily out of work or has suffered a loss due to health reasons.