Luo Kai nodded: "I promised to write a song for Su Yunzhen, and I will go to her side to have a look later." Li Mengru beamed: "That's great!" Although it is a guest appearance, it can undoubtedly be regarded as a bright spot in publicity, which adds a lot of color to the film. Su Yunzhen is a first-line actress with a strong appeal in the market. She encouraged: "Then you really have to write...