神舟10号飞船周三安全着陆

China has completed its longest manned space mission yet, marking an important step toward the goal of building its own space station.

The return capsule of the Shenzhou-10 spacecraft touched down safely early Wednesday in China's remote Inner Mongolia region. The three astronauts aboard waved and smiled for after emerging from the capsule.

During their 15 days in space, the astronauts successfully docked with and carried out other tests on the Tiangong-1 experimental space module. China hopes the orbiting lab can serve as a prototype for a permanent space station that it hopes to build by 2020.