1, Xi Anhongsheng Medical Oxygen Distribution Center: This is a professional enterprise that distributes medical oxygen. Its main business includes Xi 'an medical oxygen distribution and lease of oxygen cylinders, free filling of inflatable oxygen bags, domestic medical oxygen 10L, 15L, 40L medical oxygen cylinders, oxygen flow meters, etc. Provide oxygen for the heart, brain and lungs of the elderly, oxygen for pregnant women during intrauterine hypoxia, oxygen for clinics and medical institutions, and oxygen for daily family health care. The address is Floor B 18, Bailong Square, Xiaozhai East Road, Yanta District, Xi City, Shaanxi Province.

2. Tangqin New Age Gas Co., Ltd.: This is an enterprise specializing in the production and sales of industrial gases. Its main products are Xi 'an oxygen products, Xi 'an carbon dioxide products, Xi 'an carbon disulfide products and Xi 'an acetylene products. Provide gas demand for industries such as industry, chemical industry and metallurgy. The address is 69 Keji Road, Hi-tech Zone, Xi City, Shaanxi Province.