If inflation and other factors are not considered, the annual income is 10%, and the book value after 10 years is 200,400 yuan. Calculated by annual income 15%, it is 262000. Annual inflation is equivalent to 77,282 yuan or 64,763 yuan today. Don't wonder, why is it less than1000x12x10? Because 10 years later, your investment 1000 is only equivalent to 247.2 yuan now.