Forensic Heroes 4 - 法證先鋒4
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A costume fitting press conference was held on 24 October 2018. The filming lasted from October 2018 to March 2019. The blessing ceremony was held on 21 January 2019. 

The character, Chris Chui-yi, was originally played by Jacqueline Wong, who was removed from the filming due to Onsum Cheating Scandal.She was replaced by Roxanne Tong and the re-shooting lasted from June 2019 to July 2019.