land yearly-rent system

And try to innovate in the two parts, make an attempt to put up new exploration in the mortgage-backed securitization and land yearly-rent system.
并力求在前人成果的基础上有所创新，在实行住房抵押贷款证券化方面与实施土地年租制方面进行了新的探索，力求有一定的理论与实际价值。