Put the piano barrel at the root of the left leg near the lower abdomen. Holding the piano in his left hand, he is riding on the piano pole in the jaws of death. The thumb is slightly bent, and the palm of your left hand should be suspended when holding the piano. Don't bend your finger joints excessively, and keep the bow full at a constant speed. When pulling the inner string, press the bow hair inward with the power of the middle finger and the ring finger, and the bow should have a certain tension. When pulling the outer string, always rely on the back of the middle finger and the top of the thumb abdomen. The middle finger is the center of the five fingers. Hold the bow against it. When holding a bow, move the big arm first → then the small arm → and finally the wrist.
Erhu is a stringed instrument. There are two strings, and the modern erhu has a pure five-degree tuning, which belongs to the high-pitched instrument in the Huqin.