Astronauts are "rescued" by a helicopter during a sea survival training in waters off the coast of Yantai in east China's Shandong Province, Aug. 21, 2017. A group of 16 Chinese and two European astronauts completed the sea survival training on Monday. The 17-day joint program was the first time Chinese astronauts have conducted survival training at sea. Organized by the Astronaut Center of China (ACC), the program was designed to prepare astronauts with skills including exiting the capsule themselves, survival at sea and rescue. (Xinhua/Guo Xulei)