If it’s her shift supposed to be from 4 p to 12 mn, it’s a 8- hour shift. She should get overtime pay from 12 mn to the time she actually leaves. I was a registered nurse and worked at national Taiwan university hospital one east floor ( thoracic surgical floor) from 1986-1987. The nurse patient ratio was 1:5 or 6. It wasn’t too bad. I’ve been a RN in U.S. from 1988 till now. I want to say I enjoyed working in U.S.
Slight suggestion, you should rename your series to “Alone yet not lonely” it would better match your mandarin title of “加班不孤單” but really love the content, love that it provides a lot of insight into careers.