Nearly 12 million Chinese high school students have taken part in this year's national college entrance examination, commonly known as the Gaokao. As one of the hardest exams in the world with great pressure on students, the Gaokao has always been a topic of discussion in China. How does China's education system work? What are the problems? What are the changes we could see in the future? To find out more, the host is joined by educators and academics.