It was on this evening that the three leaders distributed oxygen bottles, oxygen masks, and regulators to everyone. Ren He felt a peculiar sensation holding the heavy oxygen bottle.
In the mountaineering community, there is controversy over the use of oxygen bottles. Some climbers with idealistic spirits insist that after a prolonged period of acclimatization, athletes with outstanding physical prowess can reach the summit without the aid of oxygen. Purists elevate this view to the logical extreme, believing the use of supplemental oxygen amounts to cheating.
So, some have contended that the ascent of Mount Everest with the aid of oxygen doesn't count as a true summit. It'd only be a genuine conquest when someone succeeds in ascending without supplemental oxygen—a feat never accomplished, at least not with verifiable evidence, in this parallel world by 2007!