Actually, this is an interesting question. In Chinese, no matter what the "head" of a school is, it is called "principal", but in English, the title of "principal" is different. The headmaster of a school is usually called the headmaster in American English, the head teacher in British English and the headmaster in the past. The president of a university is called the president. However, chancellor of British universities is a virtual title, which can be translated as "honorary president". The real president is the vice president. . . Don't forget to adopt it when you are satisfied.