At this altitude, it's already extremely difficult for ordinary climbers to fall asleep.
For Li Younan, his high-altitude experience is about 3000 meters, similar to an ordinary person's experience in some prairie counties of Ganzi Aba.
Li Younan also felt a bit of tension and pain in his temples. Although his blood oxygen was not an issue, it still affected his sleep.
Surprisingly, it took him more than ten minutes to fall asleep.
Fortunately, after looking at his watch, he soon drifted into dreamland.
The next morning, Li Younan woke up naturally.
He had a knack for waking up close to the alarm time if he had plans the next day, even without an alarm.
Looking at his watch, it was a little past 3:40, and the sleep monitor showed he had slept seven and a half hours the previous night, with high quality, deep sleep proportion, and continuity both good.
Li Younan was somewhat satisfied, as only by sleeping well could he be full of energy for climbing.
