If there wasn't a dispersed oxygen machine, engaging in some high-intensity partner exercises at this altitude would be quite life-threatening.
But with an oxygen machine, the oxygen levels in the room consistently remain at a concentration that even an average person feels quite comfortable with, so this issue doesn't exist.
Li Younan closed the door, then let Asrada draw all the blackout curtains, and walked over a bit helplessly to help Liu Li up from the ground.
"Why are you back?" Liu Li asked, disregarding the bump on her head.
"Something unexpected happened, need to stay here for two or three days before heading out again."
"Oh oh, you scared me... eh, what are you doing?"
"I'm checking if you got hurt."
"I hurt my head. What are you doing... don't, don't take it off..."
