How many years of social security payments count as a grade

pro, for you to check the social security years to pay social insurance fund years (also known as "working age"), pay social insurance fund the longer the number of years, the higher the amount of pension, some provinces, autonomous regions, municipalities directly under the Central Government to the age of the grades are divided into 15, 20, 25, 30, 35, 35 years or more than six grades. Some provinces, autonomous regions and municipalities directly under the central government divide the length of service into six grades: 15, 20, 25, 30, 35 and more than 35 years. There are also places that do not divide the grades, there is one year of service counted as one year of service, the maximum age of 44 years (according to the age of 16 years old to work, 60 years of age retirement calculation).