Erhu quick handlebar change is an exercise in which the left and right brains quickly coordinate and cooperate, so to practice quick handlebar change, you must have a clear mind, coordinate the movements of the left and right hands, and if there is a slight deviation in the coordination of the left and right hands, it will be muddled.

As far as the theory is concerned, for example, when playing a 1//5 string, the second finger 5 is changed to the first 3. When the sound of the 5 is finished, the left finger must be fast before the right bow is changed. Switch to the phoneme of 3, when the left finger is in place, the right hand just switches the bow to start. If during the movement of the left finger to change the handle, the right hand starts to change the bow, then the following two muddy situations will occur:

1. The fingers touch the strings during the bar change, resulting in unnecessary portamento.

2. The fingers do not touch the strings during the process of changing the handle, resulting in unnecessary empty string sounds.

For the same reason, if the change occurs on two different strings, the situation is a little more complicated than the change of the same string. In addition to the above, it is necessary to correctly grasp the timing of the change. Therefore, when practicing quick handlebars, you must start from slow motion. When the response of the left and right brains reaches subconsciousness, the technique will be handy, and it must not be rushed.