How did Laure Shang improve her singing skills so quickly?

As far as I know, she hasn't asked the teacher for help. She is just a singer with a unique voice, passion and tenacity. As the judge teacher said at the beginning, singing needs talent, and Laure Shang's talent in this respect is quite high. She is inexperienced and seldom has the opportunity to sing in public. After several years of training and accumulation, she has matured, and people who work together, such as songwriters and accompaniment pianists, will give some guidance. She is also a smart person, good at thinking and working hard, so it is not surprising that she has changed today.