The technique of right and left hand coordination occupies a very important position in the art of erhu performance. The correct cooperation of the left and right hands can obtain good pronunciation, which can make the expression of music richer, more accurate and more vivid. The quality of a sound is judged according to whether it has a good resonance. Then, in addition to the sound of the open strings, whether the resonance is sufficient, the problem is not only the right hand or the left hand, but the result of the cooperation of the left and right hands. That is, bowing with the right hand requires the correct pressure, that is, the correct proportional relationship between the bow speed and the pressure; and the left hand also requires the correct pressure for stringing. The problem that usually occurs is that the pressure of pressing the strings is too high, and the force is too high, which destroys the good vibration of the strings. It can be seen from the above discussion. Good pronunciation comes from the correct use of pressure on both hands, and the purpose of training is to remove excess strength from both hands. In addition, clear fast bow pronunciation also depends on good coordination of both hands. That is, the accuracy of the coordination of the "dot" pronounced with the right hand and the "dot" of the left hand.

In short. Any means of expression is inseparable from the good cooperation of the left and right hands, and the importance of the cooperation of the left and the right when expressing different musical works is reflected in the different changes of the left and right hands to make the music expression more appropriate and vivid.

Like language expression, music has different connotations due to changes in tone. In addition to changes in strength, I think the change in tone is more important in musical expression. Changes in timbre. It also relies on the cooperation of the left and right hands. As an element of music, timbre has the same importance as rhythm, strength, pitch, etc. It is one of the important means of musical performance.

The usual fluctuations we always understand from the perspective of strength. In fact, the range of dynamics that an instrument can do is limited relative to the range of timbre changes, while the changes in music are infinite, which requires us to expand the possibilities in timbre changes as much as possible. This possibility is difficult to achieve by any left-handed means or right-handed means alone, which requires the cooperation of the left and right hands. And it is because of this ever-changing combination. There is a huge possibility of sound changes.

Vibrato is a very important means of musical performance. Through vibrato, the timbre of a note can be changed, and a note can have different tension. However, if these changes do not have the coordination of the right-hand bow, the performance of the music will not be perfect. It is even more inseparable from the cooperation of the left and right hands when expressing the different breath changes in the musical works. When playing the melody of "Sound and Breath", if the bow stops and the left hand does not change. Only the sound is cut off and the breath is cut off, and if the bow in the right hand stops while the left hand continues to vibrate the string, the effect of the disconnection can be obtained well.

We should see. A sound itself has a movement process. There is also a movement process from one sound to another, and this process is alive. In this process, it reflects the movement of breath and the flow of charm, and the perfect expression of this process is always inseparable from the cooperation of the left and right hands. .

Mastering playing skills is the first step in learning a musical instrument, but technology is only the foundation. While mastering skills, you should learn to correctly understand the relationship between skills and music. Rich skills come from rich music content, and the means of skills are ultimately to serve music. Understanding how to master skills more scientifically from a purely technical point of view is just the first step, understanding how skills come from and serve music. And how the richness of music determines the endless skill requirements is the ultimate goal of skill training.