At least 22 years old and no more than 35 years old when applying for the exam. According to the conditions of the special plan for doctoral enrollment in Peking University, academic qualifications: In 2023, the academic qualifications for doctoral enrollment in Peking University should be bachelor degree or above, and all applicants who require postgraduate education (master degree or above) can apply. Age requirement: In 2023, the age requirement for doctoral enrollment in Peking University is 22 years old and no more than 35 years old (ordinary citizens can register with their ID cards).