Retro Trailer: Future Cops (1993) by Wong Jing

In the year 2043, notorious crime boss General has been arrested and will be sentenced in seven days. With the presiding judge Yu Tin Hung known for being incorruptible, General has little hope of escaping the law – in the present day. Instead, General's lackeys led by Kent (Ekin Cheng) time-travel back to 1993 when Yu Tin Hung was still in high school. Their plan is to brainwash teenaged Yu Tin Hung into releasing General 50 years later. Future cops Ti Man (Andy Lau), Broom Man (Jacky Cheung) and Ah Sing (Simon Yam) also go back in time with the mission of finding and protecting Yu Ting Hung.