Not easy to test. The doctoral degree of Nankai University is the highest degree in the education system, which belongs to the existence of a radish and a pit. The number of students enrolled is strictly controlled, and the competition pressure is great, so it is not easy to take the exam. Nankai University, referred to as "Nankai", located in Tianjin, is a national key university directly under the Ministry of Education of People's Republic of China (PRC). It is a national "double-first-class" construction university and a national "2 1 1 Project" and "985 Project" key construction university.