The technique of the left hand of Erhu is inseparable from the flexibility of the fingers, and the flexibility of the fingers is inseparable from the muscles of the fingers, so the flexibility of the fingers cannot be talked about without relatively developed finger muscles.

I often receive messages from Hu You saying that the practice of fast vibrato (vibrato) is often encountered. Mastering the vibrato requires long-term training. Because there is no relatively developed finger muscles, it is often overwhelmed and insufficient. In particular, the fast bow technique with two hands is often equal to or exceeding 160 beats per minute, and the frequency of the left and right hands needs to be synchronized. For the right hand holding the bow, it is effortless to draw a fast short bow, while for the left finger It is said that without the developed finger muscles, it is impossible to keep up with the speed of the left hand, so that the pronunciation of the fast bow is rough. Then there are deep strumming, pressing, sliding, fingering, etc. If you don't have developed finger muscles to play, it will appear bland and tasteless. Therefore, special exercise of finger muscles is an indispensable subject.

1. The focus of finger muscle training is the ring finger and the little finger. The index finger and middle finger have more opportunities to use in daily life, and they are generally sufficient. The exercise of the left finger generally uses the following methods, which have been proved to be very effective:
2. The index finger, the middle finger, and the little finger remain on the string, and the ring finger moves across the string to the inside. When the entire nail surface crosses the string, it quickly returns to the outside of the string. Repeated practice, from slow to fast, is a bit like a child jumping on a rubber band look. Every time you practice at least until your hands are sore, take a break.
3. Soak handshake, straighten five fingers, make a fist, then quickly straighten five fingers, then make a fist, and repeat the action quickly. Make the forearm muscles sore and take a break. Note that the five fingers must be straight, otherwise the effect will not be good.
4. Similar to 2, press the tip of the little finger on the table and keep it still, try to raise the ring finger to the highest point and hit the table quickly, repeat the action, so that the forearm muscles are sore and then take a break.
5. Repeatedly stretch the ligament between the little finger and the ring finger, each stretch so that the plane angle between the little finger and the ring finger is equal to 90 degrees.
6. It is better to use a grip ring to assist with exercise.