Septuagenarian sets record by obtaining doctorate

Most people who obtain doctorates do so to advance their career - but that was not the case for one student at Sichuan University.

Huang Zushen, a 74-year-old United States citizen, became a doctoral candidate in the history department at the university's School of History and Culture four years ago.

With the guidance of his tutor, Professor Chen Tingxiang, Huang wrote his dissertation on the development of China's Air Force, from the Chinese Nationalist Air Force in the 1930s to the Chinese People's Liberation Army Air Force in the 1950s.