Sonata of Ling and Feng's World

A sudden attack pushed civilization to the brink of extinction, burying all its achievements beneath the ruins. The survivors of the nine races established a new order atop the remnants of civilization, but a struggle for resources plunged the races into war. Then Ling and Feng, the two most powerful people from the old civilization, were summoned into this age by a vampire girl. Can they carry out their plan and revive civilization on this planet?