Why can't I sleep in the office at night, but in a rented house? To save money, I work at night.

As you said yourself, you are worried that other colleagues will see you in the office. First, public places will have a bad influence. Second, the issue of face is also a major issue. In the rented house, although it is a temporary place, it is also your own, and you have the final say. So you can relax from the bottom of your heart and naturally ensure the quality of sleep. You just jump around the office and often wake up suddenly in your room. Or don't sleep in the office, you will sleep well. In other words, as long as the leaders don't explicitly prohibit it, sleeping in the office saves time and trouble. Why bother? Who will ask you where to sleep after work?