The Myth is both a movie produced in 2005 and a series produced in 2010, starring Jackie Chan and Hu Ge respectively. The story follows Yi Xiao Chuan who time-travels to the Qin Dynasty ending up as General Meng Yi who is tasked to escort a princess to marry Qin Shi Huang. He ends up falling in love with the princess but unable to change the course of history, ending up with a mortality elixir presumably able to ensure eternity in life.
The soundtrack to the movie and the series is 神话, which is a wonderful piece. Sharing the piano arrangement.