Shenzhou XX crew complete second spacewalk outside Tiangong station

The three orbital travelers have been aboard the station for two months since their arrival on April 25. They are conducting China's 15th manned spaceflight and have become the ninth group of astronauts aboard Tiangong, which is the only operational space station independently run by a single nation.

The astronauts have conducted a host of assignments including intra-station environmental measurements, examinations and maintenance work on instruments, and materials management since their first spacewalk on May 22. The astronauts have also conducted a series of scientific and technological work, according to the agency.