Determine if the sentence is true based on the text below:
Wu Di makes cameos in all his films.

Wu Di () is a Chinese cinematographer and one-time film director, known for his collaborations with Sixth Generation director, Wang Xiaoshuai. The director of photography for over ten films (all with mainland directors), Wu Di also wrote and directed a feature of his own, 1995's "Goldfish".
It's impossible to say