I believe that many of my friends have basically no professional music knowledge before contacting the erhu, so many beginners of the erhu have no idea about the concept of pitch. Therefore, I think that when we start to learn the erhu, we should continue to cultivate our own sound recognition ability. After we have a specific concept of pitch, we will consolidate it through the following points.

First of all, you should be familiar with the interval relationship between the various sounds in the musical tone system. For example: 1 to 2 is a major second (whole tone) 3 to 4 is a minor second (semitone) and you need to know how the major second and minor second are expressed on the erhu. For example, the 3rd and 4th tones of the upper position in the key of D means that the middle finger and the ring finger are close to each other, but the 3rd and 4th tones of the outer strings in the key of G means that the index finger and the middle finger are close.

The second point is the mastery of the "pitch" roll call. The learner must identify the standard tone (that is, a group of small letters on the piano) skillfully. After you can clearly identify the standard sound, it is not so difficult to distinguish other sounds according to the interval relationship, as long as you practice diligently, you can master it quickly.

The third point is to listen and sing more. When practicing, you should dare to sing, sing often, sing boldly, and sing while listening. The more you sing, the more you can naturally control the pitch, so the requirements for intonation are not easy to achieve. After mastering the sound recognition ability, it is necessary to adjust the finger spacing relationship of the fingers. Therefore, the "correct hand shape" plays a very important role in the intonation of the erhu.

The correct hand shape of the left hand is very simple, in line with the laws of nature and the laws of life. For example, the correct hand shape is similar to the posture of holding a teacup in our life. The tiger's mouth of the left hand is lightly "hanging" on the piano bar, the thumb is slightly bent, and it should not be lifted up vertically, nor should it be bent downward to squeeze the piano bar tightly. Leave enough space in the palm of your hand to hold an egg. The fingers are naturally bent to form a half-clawed fist, but the palm of the hand cannot be attached to the piano bar, and the palm always maintains the feeling of "holding an egg". The entire left hand should be relaxed, and the forearm should hang down naturally, forming an angle of about 45 degrees with the piano bar, and the forearm to the palm should be in a straight line. When some beginners hold the piano, they tend to raise their arms with their left hands almost parallel to the shoulders, which will cause the arms to fall into a stiff state. When pressing the strings and changing the bars, it will be very rigid, and the fingers will not be able to press the strings flexibly.

After mastering the correct hand shape of the left hand, you also need to pay attention to the contact points of the fingers on the strings and the strength of pressing the strings. The correct touch point of the finger is the fingertip part, which can make the finger touch the string easily, flexibly and elastically, and can also achieve accurate pitch.

If the fingers are pressed too hard, the fingers will be tense, which will make it difficult for the left hand to change the handle, resulting in inaccurate sound. If it is too light, the sound will be unreal, unclear and distorted. Therefore, the intensity of pressing the strings should be just right, and only when the sound is just right can a beautiful and pure sound be obtained, and this just right depends on the constant exploration of beginners in practice.