How large were the enrollments at Indira Gandhi National Open University and China Central Radio and TV University?

In the context of distance learning, the Indira Gandhi National Open University and the China Central Radio and TV University are classified as "mega-universities" due to their massive student populations.1

According to data from the early 21st century, their enrollments were as follows:

• Indira Gandhi National Open University: Headquartered in New Delhi, this institution had an enrollment exceeding 1.5 million students.2
• China Central Radio and TV University: Headquartered in Beijing, this institution had more than 500,000 students.2

These figures illustrate the significant scale of public institutions that utilize distance learning methods to provide higher education to large numbers of students.2