Professional piano grading must be enrolled in a full-time conservatory of music, which is divided into three levels.
There are two kinds of amateur pianos, one is impromptu piano and the other is classical piano. Impromptu piano grading test is a prerequisite, and you must pass the classical piano level 10. The classical piano exam is divided into ten grades, and you can choose to take it slowly.
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From a practical point of view, the tenth piano certificate only plays a small role in the middle and high school stage, and has no effect in most areas. Those who sign up for the examination of special students of high-level art troupes in colleges and universities are only eligible for registration. If you want to get extra points, you need to go far beyond the so-called tenth level, and even reach or approach the professional level.
For adults, it has no effect. You can write at most one more sentence on your resume. CET-6 or above is helpful to apply for schools in Commonwealth countries.