The Derek Tsang Kwok Cheung, Jimmy Wan Chi Man written and directed film LOVER'S DISCOURSE (LUEN YUN SHUI YU) consisted of four connected stories about modern city young people's different approach to love. William Chan Wai Ting in the film played a quiet student who often ate and watched sports at his classmate's home, in turn falling for his mother (Kit Chan Kit Yi). Speaking of constantly playing characters who fall for older women and his relationship with Charlene Choi Cheuk Yin, Chan Wai Ting gave the impression of "telling his own story". He explained that the film was made at the end of 2008. He remembered the personal experience that Tsang Kwok Cheung told him. Cheung Kwok Cheung admitted that during research he discovered many men had an oedipal complex. Thus he decided to put his own experience on the big screen.
Tsang Kwok Cheung said, "In school I often went to a certain classmate's home. His mother was very pretty and tasteful. Every time I went I would be very nervous and secretly paid attention to her every move. I was afraid that others would find out." This crush finally ended, but Tsang Kwok Cheung added that in real life he absolutely would not be as daring as Chan Wai Ting. He would only have some fantasy in his mind.