Senior sister is used to address people who have followed the same teacher earlier than themselves. It is also called the son or father of a master who is older than himself, and it is also called "brother" in spoken language. It's not limited to calling each other brothers between men, but also between women and on campus.

Teachers refer to the length of officials; A title of respect for a teacher; Under the current military system, the officers who command the first division of the Army are called "teachers".

Teachers are professionals who teach students knowledge.

There are various types of education (primary school teachers, junior high school teachers, senior high school teachers). At the same time, it also refers to people who are worth learning in some way and can bring you some correct knowledge and guidance. The related festival is "Teacher's Day" on September 10.

In ancient times, teachers were often called "masters, masters, teachers, pedants, lecturers, etc." Professions similar to teachers include lecturer, coach, professor, teacher, doctor and so on.

In 20 16, the number of full-time teachers in various schools in China was157.82 million, including 5.789 million in ordinary primary schools, 3.488 million in junior high schools, 2.232 million in kindergartens and 53,000 in special education.

Ordinary high school teachers1733,000, middle school teachers 840,000, and full-time teachers in ordinary colleges and universities1602,000.