This article is for business communication. If reproduced, please indicate the source and author. Copyright is private. Do not reprint without permission. Second, the left hand: 1. String method. There are two common methods of pressing strings now. First, stick the thumb of the left hand on the back of zhongruan's fingerboard, and the four fingers of the food, middle finger, ring finger and little finger will stretch naturally. The palm of your hand will be in a semi-fist-clenched style, and the fingertip will be pressed to the position slightly above the product bar, so that the wrist and big arm will droop naturally. Another method, different from the left-handed tiger's mouth, is similar to the pinch-pressing string of playing an electric guitar. Zhongruan fingerboard is sandwiched between the jaws of his left hand, his thumb is placed above the fingerboard, and the other four fingers press the strings. This method is more conducive to the thumb to participate in the string pressing action while lying on the side. In the process of pressing strings, the wrist should not bow forward, the big arm should be stiff and upturned, any joint of the left hand should not be sunken, and the fingers should not be nervous. Ordinary string-pressing pinch string-pressing II. Finger force problem. The most basic and first problem to be solved for novice left hand is the problem of finger strength, that is, the independence of finger. Min Shi, Zhong, Wu Ming and Xiao Zhi are like four people. The index finger is naturally flexible and powerful, the middle finger is independent and tall, the ring finger is bound by the middle finger and dragged down by the little finger, which is short and thin. Under such an unequal condition, to train them to be relatively balanced and independent, we need clear targeted training. Practice finger exercises and finger live etudes to achieve the following training goals. First, the fingers remain relaxed, and the finger force is concentrated at the fingertips, falling naturally like a small hammer; Second, stop the sound accurately and don't get into the habit of making frequent mistakes; Third, the fingers "from cold to hot" practice, feeling flexible, stretched and relaxed. 3. Comprehensive exercise: In addition to mastering the basic overtones, kneading, reciting, hitting, playing and sliding, the left hand should also carry out special exercises of pressing horizontally, changing handles and jumping handles. Pay attention to whether the preparatory action before the left wrist string is smooth and natural, and whether the thumb lever is reasonable. Practice key scales, modules and arpeggios for the commonly used upper, middle, lower and treble positions. Various fingering and scale arpeggio exercises of the left hand can refer to JiLiang Lin's "JiLiang Lin Ruan plucking", Xu Yang's "Shi Ruan" and Liu Xing's "zhongruan-using modern techniques to find etudes" for targeted finger training. Third, the cooperation of the left and right hands After a long period of strict and boring independent training of the left and right hands, it is time to test whether the basic training of the hands is in place. Check whether your brain is coordinated with your left and right hands, and whether the timing of the left hand falling and the right hand plucking is appropriate. At this time, in addition to practicing mechanical boring single-goal etudes, it is also a process of gradually increasing etudes with musical attributes and hands-strengthening purposes, and changing the focus from professional independent fingering training to comprehensive fingering training. It is suggested that this kind of etudes can learn from violin etudes to achieve the purpose of practice, and it is suggested that Kaiser, Dent and Wuji (full version) be used as etudes to train the cooperation between hands.