Assistant professors are different from assistant professors. Different professional titles: professor assistant usually refers to the employment system in universities or research institutions for a certain period of time, which is established to train young scholars to become future professors. Assistant professors are mainly responsible for teaching, scientific research and research, and receive guidance and training from senior teachers in the process. Assistant professor is a kind of teaching title in colleges and universities, which usually develops from assistant professor position to full professor position. Assistant professors need to undertake teaching and scientific research tasks independently, and concurrently hold some academic and administrative positions.