Shenzhou astronauts complete second spacewalk

Cai and Chen installed an extended pump set and verified a plan for extravehicular emergency rescue during the spacewalk and returned into the station at 5:47 pm, said the agency.

The four-hour activity enabled astronauts to test whether the robotic arm on the station's Wentian lab module could work well and also to check the performance of spacewalk-support apparatus, it noted.