This is to start from the basic tutorials on music theory, in layman's terms, 88 keys on the piano, 52 white keys, 36 black keys, take a small set of words (piano center DO to SI), seven basic levels, singing names were DO RE MI FA SOI LA SI, purely white keys, but the middle of the five black keys, then simply put, RE - MI middle black keys sing up RE or down MI, FA - the black keys in the middle of the SOL sing rising FA or falling SOI, and so on, in pitch, falling MI is a semitone lower than MI, rising FA is a semitone higher than FA.