Listening, distinguishing and correcting pronunciation are the core of learning Mandarin. If a teacher is easy to get along with, even the worst teacher can hear whether you are right or wrong. A good teacher can tell you how to use your lips, teeth, tongue and chin, and how to change the language habits of dialects. Now the learning environment is very convenient. Practice from the words, record while practicing, then listen to your own recordings and compare them, then correct them, practice repeatedly, and cooperate with the news broadcast practice. It is not difficult to learn Mandarin well.