In "Little Joy," Lei 'er's mouth shape and lines did not match when she spoke. Did she change the ending to satisfy the audience? No, it wasn't. The ending of Little Joy was based on the original author Qiao Yifan's plot and character. It was different from the original story and character settings. In the novel, when Lei 'er spoke, the shape of his mouth and the lines would sometimes not match. This was mainly because the relationship between the shape of his mouth and the sound was more complicated. Sometimes, the shape of his mouth would be wrong, but the lines would be correct. This kind of situation was quite common in novels. They didn't make changes to satisfy the audience. Adapting a novel was a creative act that involved legal issues such as copyright. In the process of adaptation, the author had to respect the copyright and creativity of the original author and obtain the consent of the original author before adapting. In the process of adaptation, the author needs to do in-depth research and analysis of the original work in order to better understand the plot and character setting of the original work, and on this basis, adapt and create new ideas. Only such an adapted work could better meet the needs and expectations of the readers.