Due to the fact that both Mingdao and Guo Pinchao had "bed scenes" with Wu Yaxin in "Knock Knock, I Love You", however, Mingdao's was of the "rough" type while Guo Pinchao and Wu Yaxin's bed scene was of the "mutual affection" type. When Wu Yaxin was asked about the scene where she was forcibly kissed by Mingdao, she said: "My eyes were swollen after that scene was filmed!" Mingdao had to forcefully suppress Wu Yaxin, leaving quite a few bruises and pressure marks on her wrists and neck; On the other hand, Guo Pinchao was very gentle. Guo Pinchao said: "I know that filming such scenes can make women uncomfortable." After filming, he considerately asked Wu Yaxin if she felt any "discomfort". Mingdao deeply remarked: "In fact, some plays are harder to act than to actually do, bed scenes are just like that."