The teacher of in-service postgraduate students in Wen Qi said that the reform of part-time enrollment for in-service doctoral students in 20 17 has not been cancelled, and the second in-service doctoral students have very strict requirements for applicants. On-the-job doctoral students generally need to apply for a master's degree and have five years or more work experience when taking part in further studies. In addition, in-service doctors also have restrictions on the age of candidates when conducting academic research. Candidates in the on-the-job doctoral program must not be over 45 years old if they are doctors in the national plan. However, there is no age limit if training is entrusted or self-funded.