Shaanxi Changmei Science and Technology Co., Ltd. is a professional manufacturer and integrator of track series vibration and noise reduction technology products and power supply insulation protection products in China's railway and urban rail transit fields. It is mainly engaged in the research and development, production, sales and service of six series of products, including vibration and noise reduction of polymer materials, protection of new insulating materials and mechanical application of non-metallic composite materials. The products have been applied in more than 400 urban rail transit lines and nearly 100 national railway projects, and have won the honor of "excellent supplier" for many times by owners and general contractors.