This is a revised edition that has been newly edited from the 6 volumes and 4 books of the old edition into 4 volumes and 4 books, including right-hand bow practice/daily practice of single-note notes/scale practice/3/4 beat slur practice/4th finger practice/chromatic scale practice/embellishment practice, etc., and accompaniment notation has been added to Volume 1, which did not have accompaniment notation, so that many application songs can be systematically practiced.