Nanjing University, referred to as "Nanda" for short, is a national key university directly under the Ministry of Education and the Central Government of People's Republic of China (PRC). It ranks among the first batch of "double-class" A-class, "985 Project" and "21/project" key construction universities in China. At present, the in-service doctoral degree of Nanjing University is the highest in China. Therefore, it is also a good choice to choose Nanjing University for doctoral studies.