"The King of Boxing" tells the story of how Tong Shiyi (played by Kevin Cheng) and Bi Jiacheng (played by Raymond Wong), a former boxing champion and a new star in the boxing world, met each other through fighting and then encouraged each other. It is reported that in order to get the body of a boxing champion, Kevin Cheng had to control his appetite for several months, and even ate only one bowl of noodles a day, which made him go from a LAW king to a noodle king. In order to have a large number of fighting scenes in the play, Kevin Cheng also practiced hard day and night, and his fist-to-flesh performance will bring the audience a scene of blood boiling. Nancy Wu is a woman who is as brave as a man in the play. She learned sign language and Muay Thai for the first time for the drama performance, playing the role of a deaf-mute female boxer Ding Enci. She and Kevin Cheng established a deep mentor-apprentice friendship because of boxing.