The oxygen bag or small oxygen tank can be filled in the clinic, Lhasa has a lot of clinics, Jiangsu Road there are several private clinics can be filled with oxygen, can also be filled in the special oxygen store, if it is a large oxygen tank can only be filled in the oxygen store, Lhasa Potala Palace about 80 meters away from the west gate there is a special oxygen store, Nyingchi Bayi town needs to be filled in Guangdong Road, I hope it helps
There's an oxygenated building right across from the Lhasa Environmental Health Authority on North Sala Road