演奏者的左手技术都是在指板上发挥的，指板高度的降低马上会让左手感觉不舒服，弦离指板远了，手指按下去感觉弦“很深”，发音灵敏度降低了，琴的声音也进而受到损害。 指板高度降低的原因很多。大致有以下几种：指板本身会变形，向下弯曲。琴弦的长期抻拉会使琴颈或颈榫弯曲 The player’s left-handed technique is played on the fingerboard, the lower fingerboard height immediately makes the left hand feel uncomfortable, the string is far away from the fingerboard, the finger is pressed to feel the string “deep”, the pronunciation sensitivity is reduced, and the piano The sound is further compromised. Fingerboard height reduction for many reasons. There are roughly the following: fingerboard itself will be deformed, bent down. The long-term pull of the string will bend the neck or the tenons