Mad World (Cantonese: 一念無明) is a 2016 Hong Kong drama film directed by Wong Chun and starring Shawn Yue, Eric Tsang, Elaine Jin and Charmaine Fong.

Tung, a former financial analyst who is struggling with bipolar disorder, is placed in the custody of his truck-driver father after being discharged from a mental health institution.

Wong and Chan cited Cageman (1992), about an impoverished community living in cage homes, as a major influence.

A fraction of the profits were used to compensate actors Eric Tsang and Shawn Yue, who waived their salaries, and the few crew members who worked for free.

He wrote, "Mad World is not quite the profound reflection of reality its makers intended it to be, but despite its flaws this is a brave film.