In Big Brother (2018), Hong Kong action star Donnie Yen plays Cheng, a former special forces operative turned high school teacher. The film combines action, drama, and humor as Cheng is tasked with turning around the lives of a group of troubled students at an underperforming high school. With his unorthodox teaching methods, Cheng quickly earns the respect of the students, but he soon realizes that the school's troubles go beyond poor grades.

When a group of dangerous, gang-related students begin to threaten the safety of the school and its faculty, Cheng must use his combat skills and strategic mind to protect his students and confront the dangers head-on. With a mix of intense fight scenes, thrilling stunts, and heartfelt moments, Big Brother delivers both high-octane action and an emotional story about redemption, loyalty, and the power of teaching.

As the stakes rise, Cheng finds himself going beyond the call of duty, proving that even the toughest fighter can also be a mentor who leads by example. The film showcases Donnie Yen’s action prowess while also delivering an inspirational story of how one person can make a difference in the lives of others, no matter the odds.

 In Big Brother (2018), Hong Kong action star Donnie Yen plays Cheng, a former special forces operative turned high school teacher. The film combines action, drama, and humor as Cheng is tasked with turning around the lives of a group of troubled students at an underperforming high school. With his unorthodox teaching methods, Cheng quickly earns the respect of the students, but he soon realizes that the school's troubles go beyond poor grades.

When a group of dangerous, gang-related students begin to threaten the safety of the school and its faculty, Cheng must use his combat skills and strategic mind to protect his students and confront the dangers head-on. With a mix of intense fight scenes, thrilling stunts, and heartfelt moments, Big Brother delivers both high-octane action and an emotional story about redemption, loyalty, and the power of teaching.

As the stakes rise, Cheng finds himself going beyond the call of duty, proving that even the toughest fighter can also be a mentor who leads by example. The film showcases Donnie Yen’s action prowess while also delivering an inspirational story of how one person can make a difference in the lives of others, no matter the odds.

film directed and co-produced by Donnie Yen, who also stars in the film alongside an ensemble cast that includes Julian Cheung, Michael Hui, Francis Ng, and MC Cheung Tin-fu. Loosely based on a real-life 2016 drug-trafficking case, the story follows a police detective-turned-public prosecutor (Yen) who risks his life and career to help a wrongly accused defendant (Mason Fung) entangled with a crime syndicate led by a law-educated drug lord (Julian Cheung).

Driven by the Supreme People's Procuratorate and co-produced by Hong Kong's Mandarin Motion Pictures and China's Shanghai Huace Film, the project was initially conceived as a legal drama film. The screenplay began development by Edmond Wong during the COVID-19 pandemic. In 2023, co-producer Raymond Wong approached Donnie Yen for the lead role, leading to a reimagining of the film as a hybrid of action and legal thriller. Pre-production started in May 2023, with principal photography taking place from October 2023 to February 2024 in Hong Kong. Japanese action choreographer Takahito Ouchi served as the film's action director.

The film was theatrically released in Hong Kong and China on 21 and 27 December 2024 respectively. It received generally positive reviews from critics, who praised the action, innovative genre blend, and performances of the cast, particularly Donnie Yen and Michael Hui, but the screenplay and the lack of exploration of themes regarding justice in Hong Kong were subject to criticism.

film directed and co-produced by Donnie Yen, who also stars in the film alongside an ensemble cast that includes Julian Cheung, Michael Hui, Francis Ng, and MC Cheung Tin-fu. Loosely based on a real-life 2016 drug-trafficking case, the story follows a police detective-turned-public prosecutor (Yen) who risks his life and career to help a wrongly accused defendant (Mason Fung) entangled with a crime syndicate led by a law-educated drug lord (Julian Cheung).

Driven by the Supreme People's Procuratorate and co-produced by Hong Kong's Mandarin Motion Pictures and China's Shanghai Huace Film, the project was initially conceived as a legal drama film. The screenplay began development by Edmond Wong during the COVID-19 pandemic. In 2023, co-producer Raymond Wong approached Donnie Yen for the lead role, leading to a reimagining of the film as a hybrid of action and legal thriller. Pre-production started in May 2023, with principal photography taking place from October 2023 to February 2024 in Hong Kong. Japanese action choreographer Takahito Ouchi served as the film's action director.

The film was theatrically released in Hong Kong and China on 21 and 27 December 2024 respectively. It received generally positive reviews from critics, who praised the action, innovative genre blend, and performances of the cast, particularly Donnie Yen and Michael Hui, but the screenplay and the lack of exploration of themes regarding justice in Hong Kong were subject to criticism.