Shenzhou 12 was originally planned as the second visiting mission for the experimental Tiangong-2 space station, following Shenzhou 11. In 2016, plans for a second mission to Tiangong-2 were cancelled, and Shenzhou 12 was designated as the first crewed mission to the Tiangong space station which currently consists of one module, the Tianhe module, launched on 29 April 2021. The flight marks the first of four crewed missions scheduled to dock with the Tiangong station by the end of construction in 2022.

Approximately 4” Diameter