Yanjiao, located 30 kilometers east of Tiananmen Square, belongs to sanhe city. It was named because it was located in the suburb of Yan State (now Beijing) during the Spring and Autumn Period and the Warring States Period. China Yanjiao Material Recycling Co., Ltd. Address: Administrative District Code of Yanjiao Economic and Technological Development Zone, Sanhe: 13 1082 Postal Code: 06520 1 Tel: 0316-3317198 Business scope: The registered capital of industry, agriculture, recycling of civil waste materials, automobile repair and sales of mechanical and electrical products and accessories is 100 (ten thousand yuan)/Sanhe/co/2074.htm.