Charlene Choi (蔡卓妍) and Wong Cho Lam (王祖藍) collaborated in a love movie, Just 1 Day (給我一天) which was edited from a novel. In the film, she played a senior customer service manager in a bank and lived an ordinary life until meeting Cho Lam. He acted as an artist who suffered from amyotrophic lateral sclerosis (漸凍人症) and tried to collect happy memories before his condition deteriorated. Hence, Cho Lam hoped Charlene became his girlfriend for a day so as to grant his wish.

Other than the two leads at an opening ceremony on 14th October 2019, Kathy Yuen (湯怡), Kaki Leung (梁嘉琪) and Michelle Wai (衛詩雅) were present. Charlene recalled she could not imagine when playing a couple with Cho Lam and found he was quite elegant upon trying their role images. Cho Lam expressed his experiences enriched after working together with Charlene and praised she was a “goddess”. He loved her performances and remarked it was full of laughter and tears when “dating” for more than a month.