Simu is a Chinese-Canadian actor who won a Game Changer Award and People's Choice Award for his role as Shang-Chi in the Marvel movie Shang-Chi and the Legend of the Ten Rings (2021). Before his leading role in a Marvel movie, he played Jung Kim on the CBC sitcom Kim's Convenience (2016). He is also a writer and producer.

Immigrating from China at the age of 5, Simu was raised in Mississauga, Ontario. After graduating from the Richard Ivey School of Business and working at a top accounting firm for nearly a year, Liu was laid off. Deciding to pursue work in film and television instead, he quickly landed roles on series such as Heroes Reborn (2015), Nikita (2010), Warehouse 13 (2009) and Mayday (2003).

He has since starred on Blood and Water (2015) and Taken (2017), and guest starred on shows such as The Expanse (2015), Bad Blood (2017), and Fresh Off the Boat (2015).

Liu has written and produced for television as well as in film. His short film Meeting Mommy was selected as a semi-finalist for the NBC Universal Shorts Festival. He was also a writer on the second season of Blood and Water, contributing as a story editor for the season and as the main writer for one episode.

Simu trains extensively in martial arts and stunt work in addition to television and theatrical performance.