What is the handyman doing in the school canteen?

It's not easy to be a handyman in the school canteen, and it's tiring to do odd jobs. There are many teachers and students dining in the school canteen, especially in middle schools and universities. There are more teachers and students dining, and there are quite a few odd jobs in the canteen. One minute you do this, one minute you do that, one minute you move things, one minute you clean, and one minute you take out the garbage. In short, the dirty work in the canteen keeps doing.