On December 31, 20x1, Second Co. decided to lease out under operating lease one of its buildings that was previously used as office space since its acquisition date, January 1, 20x1. The building has an original cost of 12,000,000 and accumulated depreciation of 500,000 as of June 1, 20x1. Second Co. uses the cost model for investment property. The fair value of the building on December 31, 20x1 is 8,000,000.

How much is the resulting revaluation surplus from the change of use?