China will build the space station around 2020, will become the important base of China Space Science and new technology research experiments, on orbit operation for more than 10 years. Chinese manned space station construction of the third step, the initial construction of three cabin, including a core module and two experimental modules, each the size of more than and 20 tons. The basic configuration is T shape, the core module is centered, the experimental module and the laboratory module are respectively connected to the two sides. Subsequently, the space station operations during the most time, there will be a cargo ship, two manned spacecraft. "The whole system adds up to more than and 90 tons. After the space station was built in 2020, it will be put into normal operation, carry out scientific research and space experiments, and promote China's space science research into the world advanced ranks, and contribute to the progress of human civilization.