Structure
The CSS is a third generation modular space station. First generation space stations, such as early Salyut (fireworks) and Almaz (diamond) stations and Skylab were single piece stations, and not designed for resupply. Salyut 6, 7 and Tiangong stations are designed for mid-mission resupply. Mir, the International Space Station, OPSEK and the CSS are modular space stations, assembled on-orbit from pieces launched separately. Modularised design methods can greatly improve reliability，reduce costs, shorten development cycle, and meet diversified task requirements.
Read more about this topic: Chinese Space Station
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