China completes key refueling test of Tiangong-2 space lab

China on Thursday successfully refueled its Tiangong-2 space lab in orbit, proving it has mastered the last crucial piece of technology to fulfill the country’s space station ambition. The mission’s chief commander, Zhang Youxia, announced the success of the test at 7:10 p.m. BJT (1110 GMT) in the mission’s Beijing command center after a five-day process. ‍