Undergraduate students directly pursue doctoral degrees. According to the information of official website, Zhejiang University, direct recruitment for doctoral students is one of the methods of doctoral enrollment, which can only be selected from outstanding undergraduate graduates recommended to study for master's degree, without going through internal and external examinations. The enrollment major should generally be a national key discipline. Direct doctoral study means that before graduation, you don't need to get a bachelor's degree or a master's degree, and you don't have to take the doctoral entrance examination. After the selection, you can directly obtain the qualification to pursue a doctoral degree.