China set to launch next space station cargo mission in May

China is preparing to launch its Tianzhou 6 cargo spacecraft to the Tiangong space station in May. The spacecraft will carry supplies for astronauts for the Shenzhou 16 and Shenzhou 17 crewed missions, as well as propellant to maintain the space station's orbit. The cargo capacity of the pressurized segments of Tianzhou has been expanded, allowing China to launch just three supply missions every two years instead of one every six months.