Erhu fingering formula: the upper part is wide, the lower part is narrow, the upper part is heavy, the lower part is light, the bow is like an arrow bow, and the string is like a curved bow.

1. Holding the qin formula: look straight ahead, sit up straight, with both feet on the ground, with both legs flat. The qin barrel is on the left abdomen, the qin bar is leaning forward, and the left arm should be relaxed.

2. The formula for holding the bow: pinch the bow rod with the right hand and thumb, and put the middle finger and ring finger in the middle. Pull the middle finger of the outer string to the outer top, and pull the middle finger and ring finger of the string to hook the bow hair.

3. "Three-step walk" formula: hold the tuner in your hand, and rely on it to tune the erhu. The outer string A, the inner string D, can only be pulled after the alignment. The active finger tone is accurate, and everyone praises the performance of the music.

4. The formula of bow movement: keep in mind the four elements of bow movement, "steady, flat, even and straight" is the most important, the big arm moves, the forearm follows, and the wrist is flexible to pull and push.

5. Intonation formula: see the finger position accurately, distinguish the whole tone and semitone, pull out the sound and listen to it, and practice the piano with accurate intervals.

6. Strength formula: It is very important to practice with empty strings. Play the piano well without being impatient. The movements of both hands should be coordinated, and the movements should be standardized and have strong endurance.

7. Rhythm formulas: The rhythm of the notes must be played accurately, the length changes must be clarified, and the tone of the sentence should be divided into a smooth and lively tone.