Where can I buy portable oxygen in Chengdu?

According to Baidu map, Chengdu Federal Medical Technology Co., Ltd. is located in Qingyun Temple Community, Huangjia Street, Shuangliu District, Chengdu, and its business scope includes the design, production, sales and installation of medical molecular sieve oxygen making equipment, medical center gas supply system, portable oxygen cylinder, plateau central oxygen supply system and plateau decentralized oxygen supply equipment.