Beijing, as one of the first cities to implement a compulsory nine-year primary and secondary education, is also the most advanced region in China in terms of education.  It has 62 institutions of higher learning like the prestigious Peking University, Tsinghua University, People's University and the Beijing Normal University.  These universities have a combined enrollment of 399,000 undergraduate students and 98,000 postgraduates.  Around 40% of the Beijing residents who are between 18 and 22 years of age are receiving a college or university education.