Teaching assistant (zh zhiào) is the lowest rank among university teachers, and it is a junior title among university teachers and teachers, which is lower than that of lecturers.
In principle, teaching assistants can't teach alone, or they can't teach all the courses of a subject. They should follow the lecturer or professor to revise their homework and assist them in teaching. Teachers' professional titles rank from low to high as teaching assistant, lecturer, associate professor and professor. The basic meaning is auxiliary teaching.
A teaching assistant refers to a position that assists teachers in teaching in colleges and universities, primary and secondary schools. Usually, teaching assistants come from graduates in the same field (not necessarily from the same school), while some are part-time graduate students in master's or doctoral programs, and some are also employed. In some schools, you must have worked as a teaching assistant before you can be promoted to lecturer, professor and associate professor.
In universities in Chinese mainland, teaching assistants are the lowest-ranking titles among university teachers. Generally speaking, if a master's degree holder gets a position in a university, his first title is teaching assistant.
Generally speaking, the work of teaching assistants is to guide the coursework, correct students' homework, be on duty in the department office and supervise the work. In classes with a large number of students, teachers will be assisted in taking experimental classes or internship classes.