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.

China's Shenzhou 11 spaceship onboard a Long March-2F carrier rocket takes off from the Jiuquan Satellite Launch Center in northwest China's Gansu province on Monday Oct. 17, 2016.