Fred Cheng (鄭俊弘) promoted the song (不要流淚) at the radio station on 2nd March 2020. He explained he changed to a new hairstyle for TVB new drama, Armed Reaction 2020 (槍師姐2020): “It is my first time to play a villain and I will be fighting for the triad chief with Tony Hung (洪永城). It is quite fun and I get to show my fierce side this time. (Scold vulgarity?) Yes, after the camera stops rolling.”

When mentioned about singing sub-theme song for Forensic Heroes IV (法證先鋒IV) drama, Fred felt happy to participate in the shooting and singing. His girlfriend Stephanie Ho (何雁詩) laughed at him upon sharing his old memories about filming the first two seasons. She asked him: “What? Are you acting as a corpse?” Fred said: “I showed her the old video clips and played Yoyo Mung’s (蒙嘉慧) younger brother at the time. It is too much when she said she was too young and did not watch it. In fact, I did play an extra such as corpse and soldier in 3 drama within a day.”