Time

Time is a 2021 Hong Kong black comedy film directed by Ricky Ko and co-written by Gordon Lam and Pinky Ho. Starring Patrick Tse, Petrina Fung, Lam Suet, and Chung Suet Ying, the film follows a retired killer (Tse) who returns to business by providing euthanasia to the suffering elderly, and finds a new life purpose through an encounter with an orphaned young client (Chung).

Synopsis from Wikipedia, CC BY-SA 4.0. Everything below written here.