Oxygen has been deeply engaged in the oxygen production field for many years, and is specializing in the research, development, production, sales and services of portable oxygen generators and consumables. Oxygen has been committed to popularizing and promoting oxygen therapy and oxygen health care knowledge for more than 30 years. With its stable product performance, good product reputation and diversified marketing model, it has gained the height of many Chinese families in the field of daily oxygen health care. Acknowledgement.