What's the name of the movie starring Wang Leehom and Liu Yifei? What's the name of the music inside? (all)

The name of the movie is Love in disguise, which is very touching. Especially when Liu Yifei plays the guzheng, Wang Leehom sees a large group of butterflies flying out, and Wang Leehom sings something you don't know. Liu Yifei really thinks it's a bosom friend. This is the exclusive feeling between lovers, and some things happened in school are particularly funny, especially when Wang Leehom held a concert to hide his identity as a big star, which was particularly funny and ended in a sweet ending!