Under Currents on an Alien Star

Li Yuanyu, once the youngest chief scientist in Huaxia, was mysteriously assassinated. When he woke again, he had transmigrated to a world of cultivation. As a crown prince, he should have been able to live in comfort, but his country fell and his family was destroyed, leaving him a prisoner. Everything was changing. What path should he, the last scion of a fallen nation, take?