In Nanchang, Jiangxi, if the social security base is 15,600 yuan, the amount of pension received is calculated based on multiple factors. Here's a breakdown:

1. For "New Entrants" (Those Starting Work After October 1, 1995):

• Basic Pension:

• The formula is ​
  (Local average monthly wage of on - the - job employees in the year of retirement+My indexed average monthly contribution wage)÷×Total contribution years×1%
  .

• Suppose the local average monthly wage of on - the - job employees in the year of retirement is ​
  A
  yuan. If the contribution base is 15,600 yuan, and assuming the contribution years are ​
  n
  years. First, calculate the indexed average monthly contribution wage. If the contribution base of 15,600 yuan is within a reasonable range compared to the local average wage, the indexed average monthly contribution wage is 15,600 yuan (if the contribution base ratio is 1, i.e., the contribution base is the same as the local average wage multiple). Then the basic pension ​
  =(A+)÷×n×1%
  .

• Personal Account Pension:

• The formula is ​
  Personal account balance÷Calculation months corresponding to retirement age
  .

• If the monthly contribution to the personal account is ​
  ×8%
  (assuming the personal contribution rate to the pension account is 8%), and the contribution years are ​
  n
  years, the personal account balance ​
  =×8%××n
  . For example, if retiring at 60 years old, the calculation months are 139. Then the personal account pension ​
  =(×8%××n)÷
  .

2. For "Intermediate Entrants" (Those Starting Work Before September 30, 1995):

• In addition to the basic pension and personal account pension calculated as above, there is also the transitional pension.

• Transitional Pension:

• The formula is ​
  Local average monthly wage of on - the - job employees in the year of retirement×My average contribution wage index×Contribution years before September 30, 1995×1.1%
  .

• If the average contribution wage index is ​
  m
  (determined based on historical contribution bases) and the contribution years before September 30, 1995 is ​
  y
  years, then the transitional pension ​
  =A×m×y×1.1%
  .

In conclusion, to accurately calculate the pension amount, specific values such as the local average wage of on - the - job employees in the year of retirement, contribution years, and personal account balance are required. The pension amount is the sum of the basic pension, personal account pension, and (if applicable) transitional pension calculated according to the above formulas.