The registered address of Beijing Ruiyi Si Technology Co., Ltd. is Room 394, Building C, No. 8 Fenggu 4th Road, Badaling Development Zone, Yanqing District, Beijing (Yanqing Park, Zhongguancun). The registration authority is the Yanqing District Market Supervision Administration of Beijing, and the legal representative is Zhang Xueqin. The business scope includes technology development, technology consulting, technology transfer, technology promotion, and technology services; Selling instruments and meters, electronic products, chemical products (excluding hazardous chemicals and Class I easily producible chemicals), communication equipment, mechanical equipment, hardware and electrical equipment, metal materials, building materials, Class I and II medical devices; Import and export of goods, technology, and agency import and export; Selling Class III medical devices. (Enterprises shall independently choose their business projects and carry out business activities in accordance with the law; sell Class III medical devices and projects that require approval by law, and carry out business activities in accordance with the approved content after approval by relevant departments; they shall not engage in business activities prohibited or restricted by the city's industrial policies.)