Fundamentally, the main reasons for Erhu's "unstable rhythm" are the insensitive sense of rhythm, the unstable sense of rhythm and rhythm, and the unclear awareness of the beat. The performance is mainly manifested in the following three points:

1. catch the tempo when playing allegro (quick bow);
2. The duration of the long note is not enough, and the timing of the notes behind the syncopation and the slur in the slur is not sufficient;
3. The rhythm is fast and slow.

The problem of "catching the tempo when playing the allegro" (fast bow) is relatively common in erhu performance, and it is mainly manifested in the allegro of the music and the faster and faster the continuous fast bow. Inadequate movement of the handle, improper mastery of the fast bow method, and lack of tacit understanding of the two hands during performance, etc. The solution is not only to patiently adjust the fast bow and the method of changing the handle, but also to adopt "slow practice" The melody played is practiced segmentally and phrasing, among which the notes with frequent changes in tempo and the melody with frequent string changes should be practiced with particular emphasis. After the technical aspects are grasped, the psychological state will be more relaxed and confident. Helps stabilize the sense of rhythm in performance.

The problem of "insufficient duration of the long note, insufficient timing of the notes after the syncopation and the slur in the slur" often causes the tempo to be unstable, to be pulled faster and faster, to catch the tempo, etc. (for example, in "Red Plum Capriccio" bB to adjust the allegro and the second part of "Listening to Song" in the allegro), which directly affects the performance of the performance. The main reason for the formation is the lack of a clear and stable sense of rhythm and rhythm and a strict sense of rhythm in the heart, so that the tempo of the long and medium notes is often insufficient, and the timing of the syncopation is not enough. The notes are always played in a hurry. When encountering these situations, you should first carefully analyze the rhythm value of different notes, and patiently use methods such as "beating the beat" and "singing the score" to adjust the rhythm of the rhythm and the feeling of rhythm changes. In addition, the reasonable bow distribution and the accurate feeling when pressing the left finger are also important factors to ensure the stability of the rhythm.

The phenomenon of "suddenly fast and slow rhythm" is mainly caused by the unstable feeling of the player's inner rhythm and technical uncertainty. Some students blindly stretch the piece in order to "pull the progress". As a result, due to the heavy technical burden and inability to perform, the easy parts of the performance become faster and faster, and the unsure parts have to be slowed down. Some have also developed the bad habit of hitting the beat with their feet. As a result, the more they beat the beat, the more panicked their hearts become. The performance falls into a messy situation, and the rhythm becomes more unstable. In this case, you should first develop good and step-by-step learning methods and habits, and pay attention to cultivate a keen and stable "inner rhythm" on the premise of mastering various playing skills. Play with a stable psychological feel, natural coordination of playing techniques and sharp rhythm changes.