The filming took place in an escape room premise in Beijing.
The film's assemble includes real tattooists and a professional stunt team (Troy's Team Action).
Besides acting in the film, some members of the Troy's Team Action also supported behind scene as cinematographers, camera operator, gaffer and assistant director.
It was Yanhu Wang (The Tattooist) and Li Lu's (Platinum) first acting job. Both are real tattoo artists from LeiShi Tattoo Studio in Beijing.