Astronauts into space module(2)

In coming days they will live in the space module, carrying out scientific and technical experiments and giving a lecture to students on Earth, Wu Ping, spokeswoman for the program, said.

There will also be a manual docking between Shenzhou X and the module, although Wu did not give a date for this.

The mission is expected to help scientists verify and improve space rendezvous and docking technology, crucial for assembling an orbiting space station.

Space rendezvous and docking is a technically difficult procedure, with both vessels moving at 28,000 kilometers per hour during the docking, making the maneuver highly risky.

Jiao Weixin,a space scientist at Peking University, said space rendezvous and docking is hard to master. "It is like asking two racing cars to keep a distance of 1 meter between them."

Two automatic dockings between the unmanned Shenzhou VIII and Tiangong-1 were conducted in 2011, and an automatic and manual docking took place between the manned Shenzhou IX and the space module in 2012.

The successful missions saw China become the third country to master the technology, following the United States and Russia.

After the Shenzhou X mission, China will enter the space lab stage, the final stage before it builds a space station around the year 2020.

Qi Faren, former chief designer of the Shenzhou spacecraft, said China needs to master four vital technologies in order to launch the space station.

So far, it has learned how to carry out extravehicular activity, and acquired the space rendezvous and docking technology thanks to the previous missions.

Solving a supply problem and recycling air and water in the space lab for astronauts on long-duration missions remain to be tackled.

Zhou Jianping, chief designer of the manned space program, said in March the Tiangong-2 space lab will be launched in two years, followed by the launch of a space freighter.

The freighter will conduct a fueling experiment with the space lab, which is expected to solve the supply problem.