If you have a lesson for 45 minutes or an hour, you can practice until Hanon finishes, but if you want to practice beyond Cherny 599, you have to practice for another year, because if the piano teacher is above Cherny 599, if the foundation is not easy to learn in the early stage, you can only play some Richard clayderman's songs and hand shapes for two years. If it hadn't been corrected by a teacher since childhood, I wouldn't have changed my hand shape now. You don't have the book of a professional teacher. Yes, but it's as fast as teaching piano in college. I saw my senior in our school's musical instrument store play Steel Base (from Hubei) one year. The important thing is to persist ... if you want to learn, you can learn a lot. If you are lazy, you will learn nothing. ...