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Wentian is more than a laboratory, and it shares the same key platform functions as that of Tianhe core module. In other words, Wentian can act as a backup for Tianhe when the latter needs rest.
Comprised of working cabin, airlock cabin, and resource cabin, Wentian has become the world's heaviest single-module spacecraft in operation, and the working cabin is the largest single sealed module in China to date.
The number of sleeping zones increased to six after Wentian docked with the Tianhe core module on July 25, laying a foundation for the Shenzhou-15 astronauts to join the Shenzhou-14 crew later.
Several scientific experiment cabinets were also installed in Wentian, including a cabinet for life and ecological experiments. With samples of different types of plants and animals, the growth experiment in space could reveal the influence of microgravity on the growth, development and metabolism of individual organisms.
Such experiments will promote people's understanding the nature of biological phenomena, said Lv Congmin, researcher at Technology and Engineering Center for Space Utilization, Chinese Academy of Sciences, adding that they could also offer scientific evidence for the evaluation of in-orbit radiation damage to astronauts and the protection for them.
Outside the module, various equipment, including a set of small mechanical arms, was installed to facilitate more delicate extravehicular activities in the future. Lights and high-definition video cameras were also set so that staff on the ground could monitor extravehicular activities more clearly.