They returned fairly late, and Xia Siyu is essentially a sleeping goddess. When she's not working, she needs to sleep for over ten hours at home to ensure she has enough energy to be active. If she's been too busy and tired before, and sleep-deprived, she might need even more sleep.
In the previous episodes, she managed to wake up early the first time because she slept early and had caught up on sleep the day before. Last time she was assigned to buy breakfast, she woke up early but went back to sleep afterwards, and didn't miss her nap. — Basically, without enough sleep, she doesn't have the energy to mess with the reality show.
This time in the desert, it was agreed that there would be competition between the teams, with the first arrivals having an advantage. They didn't have to camp together and could set off whenever they liked, each team had a guide anyway.
