BEIJING, June 16 (China Space News) -- China's Tianzhou-1 and Tiangong-2 space lab completed their second in-orbit refueling at 6:28 p.m. Thursday.

The second refueling, lasting about two days, further tested the country's refueling technology and cemented technical results from the first refueling.

Tianzhou-1, China's first cargo spacecraft, was launched on April 20 from south China's Hainan Province, and it completed automated docking with the orbiting Tiangong-2 space lab on April 22.

The two spacecraft completed their first in-orbit refueling on April 27.