The crew of China’s Shenzhou-20’s orbiting space station has completed its fourth spacewalk. The China Manned Space Agency (CMSA) says the crew installed protection devices and completed vital inspections. The astronaut trio took six hours to complete the tests. The Shenzhou-20 crew has been in orbit for more than 150 days and will carry out many scientific experiments and technological tests.⁣ ⁣ #China #Space #Shenzhou20