Group 1 - The basic pension consists of two components: the basic pension and the personal account pension [2] - The basic pension is calculated based on the insured person's contribution years, contribution level, and the base for pension calculation, and is paid for life by the basic pension insurance fund [2][3] - The personal account pension is calculated based on the accumulated amount in the individual's personal account at retirement and is paid from the personal account until it is exhausted, after which the basic pension fund continues to pay for life [2][3] Group 2 - The calculation of the basic pension follows the principle of "more contributions lead to more benefits," directly relating to the length of contribution, contribution level, personal account amount, retirement age, and local average wage [3] - The formula for calculating the basic pension includes the local average monthly wage, the individual's average contribution wage index, contribution years, and a percentage factor [5] - The Ministry of Human Resources and Social Security has launched a basic pension calculation service on the National Social Insurance Public Service Platform, allowing individuals to estimate their pensions by entering relevant parameters [6]