Three major components of China's space station program, the Tianhe core module, the Tianzhou 2 cargo spaceship and the core scientific capsule, have passed technical and quality assessments and are ready for upcoming missions, the China Manned Space Engineering Office (CMSEO) said Thursday.

The completion of the factory review, conducted by experts at China's manned space program, means the construction project of the country's space station will now enter the implementation phase, the CMSEO statement said.

China is scheduled to complete the in-orbit construction of the space station around 2022, after carrying out 11 flight missions this year and next, including three launches of different modules, four launches of cargo ships and four launches of manned spacecraft.