People's Liberation Army Astronaut Corps twelve were chosen as astronaut candidates. The Astronaut Corps was established in January 1998 and the twelve along with two PLAAF trainees sent to Yuri Gagarin Cosmonaut Training Center in 1996 forms Chinese Group 1. Seven pilots entered the Astronaut Corps in May 2010 as the Group 2. In 2014, Group 1 astronauts Wu Jie, Li Qinglong, Chen Quan, Zhao Chuandong, and Pan Zhanchun retired from the Astronaut Corps due to age; none of them had flown in a mission. The Astronaut Corps was part of the General Armaments Department until GAD's disbandment in January 2016. As part of the
Chinese as a foreign language Chinese language proficiency exam program, which tests has been taken around 100 million times (including by domestic ethnic minority candidates). Within China's Guangdong Province, Cantonese is also offered in some schools as optional or extra-curricular courses in select Chinese as a foreign language programs, although many require students to be proficient in the Mandarin first. Chinese is rated as one of the most difficult languages to learn for people whose native language is English, together with Arabic, Japanese and Korean. According to the Foreign Service Institute, a native English speaker needs over 2,200 hours of intensive study, taking 88 weeks