The correct source of teaching and research staff should be: excellent elements who have been teaching in the front line of this discipline for more than 10 years, served as class teachers for more than 5 years, and have been "rolling around" in the front line of education and teaching in this discipline.
Teaching and research staff should have certain ability of organization, coordination and guidance, and have impressive achievements that can explain problems, such as: classroom teaching level, standardized and distinctive teaching plans, academic achievements of new teachers who have grown up, standard test papers issued every semester or year, textbooks and teaching reference books that have been compiled, useful articles on education and teaching published in professional journals and websites, and even have certain influence in local, provincial and national areas.
In addition, as a teaching researcher, you should have the ability to organize teaching activities and manage teaching affairs.
References:
Baidu encyclopedia teaching and research staff