ट्रिविया

A life-sized replica of the Kowloon Walled City, said to be almost identical to the real one, was built for filming. Contrary to the claim that the set was demolished immediately after filming, significant portions were preserved and utilized for public exhibitions, allowing the legacy of the Kowloon Walled City to be appreciated by a wider audience.

Official submission of Hong Kong for the 'Best International Feature Film' category of the 97th Academy Awards in 2025.

The project had been in development since the 2000s.

At some parts the music sounds like "Walking in the Air" from the Band Nightwish.

The character Cyclone is portrayed as an autistic martial arts master. This is a departure from the original manhua, "City of Darkness," where Cyclone is depicted as a typical martial arts master without any indication of autism.