Some erhu players often appear mechanically stiff and slack when they play the piano. The consequences of these uncoordinated actions are unstable pressing position, unsure of pitch and lack of musical expression. The main reasons for this are The reason for the action of the switch is not very clear. When changing the handle, the movements of the hands and fingers are dominant, resulting in clumsy and rigid movements, which affect the natural connection of the music melody and the stability of the intonation when pressing the tone; Lord, not only does the movement appear mechanically weak, but the sound connection is incoherent due to excessive stickiness, and at the same time, the speed of the movement is obviously affected in the Allegro melody. The correct way to change the handle should use the forearm as the leading part of the action, and the hands and fingers cooperate with each other, and finally complete the meticulous action process with a "kinematic chain" transition, so that the melody of the music has been smoothly connected.

In the process of practical application, the changing skills of the Erhu can be divided into two types: "technical" and "expressive" in performance. The "technical" switch is suitable for faster music melodies, requiring a clean and neat process of movement, with no or less glissando. The "expressive" switch is similar to the playing techniques of "Chuo" and "Note", which are divided into "first slide finger" and "tail slide finger", both of which use a separate bow and the same finger to play a slower lyrical melody Slide to play. The method of changing the handle of the "first sliding finger" is to carry out the movement of the bow and changing the handle at the same time, and the effect is similar to adding a decorative portamento in front of the melody sound; The action is similar to the effect of adding a decorative portamento after the sound before the change. To sum up, in addition to solving the general problem of changing bars, players should also seriously study, research and master other methods of changing bars such as "first" and "tail" finger sliding, so as to ensure a smoother performance. Strive for performance and richer musical performance.