The composite bridge, combining old bamboo and old pine knots, is characterized by a well-balanced tone that takes advantage of the strengths of each material. Old Bamboo: Fast response, bright and clear sound Old Pine Knots: High density, core-rich, sustained sound, rich overtones By combining these two, you can achieve a sound with a good attack, transparency, and a sense of depth and warmth. Both the clarity of the high range and the stability of the low range are improved in a balanced way. ★ Erhu bridges are all made of natural materials, and each one has individual differences, so please understand. Thank you for viewing.