You must work under a scalpel. What is this?

Go to work if you have a knife. Migrant workers who have been very popular recently. Even if there is a knife in the sky, I will go to work. It expresses a person's unshakable belief, sense of mission, sense of responsibility and helplessness. This sentence is generally only used to describe the allusion of determination, because we generally believe that knives can't really fall from the sky like rain, so it is a metaphor to express the sadness of migrant workers.