There are many factors that need to be considered to identify the quality of erhu, as follows:

First, the identification of erhu must first listen to the sound, and the sound is the first. The sound quality is clean, the internal and external chords are unified, the volume is not attenuated, and the timbre varies from person to person, and there is no difference between good and bad. Quanming erhu has a good timbre, which is the primary criterion for identifying erhu.

Second, erhu wood: There are many kinds of wood used to make erhu, usually rosewood, ebony, rosewood, old mahogany, new mahogany, ebony and white miscellaneous wood. One of the most valuable is sandalwood. It is famous for Indian rosewood and African firewood. Slow growth, solid material, high hardness, strong toughness, meticulous structure, uniform texture and strong corrosion resistance. The yield is very small, the trunk is bent, and little materials are used. Heartwood is bright red or orange red, which will turn purple-red and brown when exposed to air for a long time; The color of wood is uniform, usually purple-brown. It will take at least 800 years to complete, and the annual rings are not obvious. Red sandalwood is called "gold in wood" because of its preciousness, and it is the top material for making erhu. Erhu made of rosewood is noble, elegant and solemn. Sound quality is steady, solid, penetrating, pure and gorgeous. It must be the most luxurious erhu, but it is not necessarily the best erhu. Ebony, the scientific name of Sulawesi ebony, is Indonesia's national treasure. It grows on the stone island of Sulawesi Island near the equator in Indonesia, and it takes hundreds of years to become wood. Sinking into the water, the wood structure is extremely dense, the material is hard, thick and uniform, the wood is black, with grayish brown to light red stripes, wear-resistant, not deformed after drying, oily and metallic luster. It is a famous precious furniture, high-grade decoration, craft carving and musical instrument material. Indonesian ebony, Indian rosewood and Hainan Huang Huali wood are recognized as the first mahogany and have great collection value. Erhu made of ebony is solemn and luxurious, and exudes a strong modern atmosphere. The timbre is bright but not dry, soft but not straight, witty and expressive. Dalbergia cochinchinensis is produced in Indochina Peninsula, and also grows in China and Yunnan. Its leaves are oval, white and have five petals. The flowers are red. "The best wood, besides rosewood, should be mahogany." Its purplish red, clear and changeable texture and fine structure are incomparable to similar rosewood. The erhu made of old mahogany contains almost all the excellent qualities of erhu. Elegant purplish red, clear texture and aesthetic feeling, feel like wenyu. The sound quality is mellow, quiet, round and clear, such as wine and water. The treble and bass are well balanced. As far as erhu character is concerned, the old rosewood erhu is definitely not lost to the rosewood erhu. One thing needs to be explained. Old mahogany and new mahogany are not a kind of wood. I can't understand that the new mahogany will become the old mahogany in a few years. New mahogany is a kind of wood, and there may be old mahogany as erhu. Other wood species, it is difficult to make a good erhu, not to mention.

Leather: Erhu is made of python skin, and its quality is also very important. To make high-grade erhu, you should choose healthy middle-aged pythons, and the back skin near the anus is the best. This part has fine structure, symmetry, good toughness and high strength, which is beneficial to python skin processing and high tension shielding. The bigger the scale flower, the better. The largest part of squama is in the abdomen, which is the most difficult part to be abandoned. The identification method is that the scale flower has a strong three-dimensional sense, is smooth and shiny, is elastic when pressed by fingers, is loose or not, and has no rancid smell.

Fourth, the production process: I won't go into details about the specific process indicators. It is horizontal and vertical, and the piano leans back slightly. No glue, no cracks, no wooden holes, and the color of wood grain in each part is basically the same. High-grade erhu needs no paint. The proportion of the piano barrel is even, the curve is harmonious and beautiful, and the piano shaft is closely matched, so it is good not to run the string and wind it. At present, piano barrels have many shapes, such as hexagon, octagon, circle and ellipse. Mr. Du Donghu, a famous erhu producer, has accumulated many years' experience in piano making and flattered the teacher's teaching, and made a new work-hexagonal slim waist erhu, which is unique in both internal sound quality and appearance. It basically solves the problem of volume attenuation in the high-pitched area of erhu, which is more convenient to play erhu's playing skills and show its unique artistic charm!

Five, accessories bow: white ponytail and gray ponytail for the top grade, the length of the bow rod is about 84 cm, thin and straight with good elasticity, less knots and no scars. Bow hair should be coated with rosin, but not too much. Qin code: there are loose knot code, mahogany code, ebony code, composite code and so on. The piano is small in size, but it plays an important role. The timbre of an erhu has a great relationship with the reaction speed. Compared with different wood, skin tightness, environmental temperature and humidity, erhu age and even different tracks, erhu has different requirements in material, modeling, bottom area, piano code, span length, slope shape and gradient. Prepare a few more, and try to adjust them by kneading to make them reach their best state. Pad cloth: also known as sound pad, it is also an important part to remove noise impurities, eliminate sharp sounds and moisten erhu timbre. Don't choose materials such as hard non-woven fabrics, it is better to use wool. Feel: Like jade, like water. Smooth and smooth, not stagnant or astringent.

Sixth, sensitivity: regardless of priority, it can be reflected in time and accurately; You can play all kinds of tracks easily.

Seven, erhu price: hard to say. Now India's lobular rosewood is close to the sky-high price, and there is no market for it. Other timber is also on the rise. It should be said that one or two thousand yuan of old mahogany erhu is the most suitable for cost performance. About 3,000 yuan of African rosewood erhu is also acceptable.

Eight, after-sales service: it is very important to be able to contact the manufacturer directly and get technical assistance from the manufacturer in time. The quality of this service is sometimes more important than the material.