Yuan = Yuan, the round pillow should have slept comfortably, but it was drummed every hour (when there was no clock in ancient times, it was drummed every two hours), because I couldn't sleep, and I felt longer and harder than before.
Every time = every time.
Yuan has the original meaning, but it is not as explanatory as the "round" type here. Such a comfortable pillow can't sleep, highlighting the pain of wandering outside without sleeping. It conforms to the usual technique of "Bi Xing" in Chinese poetry.