Mozart From Space | Featurette: Outer Space Residents Association

Ren Dawang wishes to train his son Ren Xiaotian, who is fond of astronomy become a piano player, for which father and son are constantly quarreling. One day, a mysterious alien Mozart appears unexpectedly, after that, Mozart helps Ren Xiaotian to start a life of "fighting" with his father. What Ren Xiaotian did not expect was that Mozart came to Earth with another mission