This was a long flight, spanning over half the globe without a stop. Li Yifei did fall asleep, unbeknownst to him, his head ending up on Wu Shuwei's shoulder. They stayed in that position for a long while until Wu Shuwei noticed and glanced at Li Yifei's half-open mouth to ensure he wasn't drooling. Only then did she purse her lips and continue reading.
Fourteen hours in economy class is indeed uncomfortable. The seats weren't spacious, so someone with Li Yifei's physique naturally felt cramped, whereas Wu Shuwei, being smaller, had some space taken by him.
Flying from day into night, Wu Shuwei eventually grew sleepy too, not realizing when she ended up leaning on Li Yifei's shoulder in her sleep. By deep night, she was resting directly on Li Yifei's lap, his hand wrapped around her shoulder.
Luckily, everyone else in their team was just as exhausted, and everyone was asleep, so no one noticed.
