Teachers are a profession,

Professor is the title of teacher.

Professors refer to senior teachers and researchers who teach in universities or community colleges, but there are differences between professors and researchers. Professors have teaching tasks, but researchers don't. Professor is the highest level of university teachers' titles. The word "professor" in Chinese comes from the meaning of "preaching and teaching to solve doubts", which is the name of academic officials in ancient China, and this position was set up in universities in the Han and Tang Dynasties in China. It has nothing to do with English. Japanese and China people call teachers "professors" in universities.