Beijing Tianyishangjia New Material Corp. (北京天宜上佳高新材料股份有限公司, also known as Beijing Tianyishangjia High-Tech Materials, Tianyi Shangjia, Tian Yi Shang Jia, TYSJ, 天宜上佳) is a supplier of advanced materials for rail, automotive, green energy, and defense applications. The company primarily engages in the research and development, production, and sales of brake pads and shoes for high-speed trains, locomotives, and urban rail vehicles. Its key products include metal, polymer, carbon ceramic, and fiber-matrix composites, as well as alloy coating materials.