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How to calculate the social security in Nanning City in 2014

710.6*12 months, it is the amount for July 2014-June 2015. And the second column from the bottom is for July 2013-June 2014, a year difference here. Naturally the numbers are different.

Similarly, in the last column, only the last 6 months are calculated using 710.6, the first 6 months use the previous year's data.