China's Shenzhou 11 "heavenly vessel" launched Monday (7:30 p.m. Sunday ET) from Jiuquan Satellite Launch Center in the Gobi Desert. The launch was shown on state broadcaster CCTV, CNN reports.
This is China's longest-ever crewed space mission. On board are two astronauts -- Jing Haipeng and Chen Dong. They will dock with the Tiangong-2 space lab, which was launched last month.
Jing and Chen will remain in space for a total of 33 days, with 30 of those spent conducting experiments related to medicine, physics and biology in the space lab.
Since October 2003, China has completed five manned space flight missions -- the last one took place in 2013 and lasted 15 days.
The Tiangong-2, and its predecessor Tiangong-1, are prototypes for China's ultimate goal -- a permanent 20-ton space station, which is expected to be sent into orbit in 2022.
China aims to send its space station into orbit two years before the International Space Station (ISS) retires in 2024, according to state news agency Xinhua.