You can apply for a doctorate in writing a thesis in an enterprise. According to the relevant public information, the conditions for applying for a doctoral degree: the applicant must have worked for five years after obtaining a master's degree. The applicant has made outstanding achievements in the fields of teaching, scientific research and professional technology, and has independently published high-level academic papers or high-level monographs in the subject field of degree application. Some of his scientific research achievements have won national or provincial awards.