QINGDAO - China's Liaoning aircraft carrier formation Thursday returned to a military port in Qingdao, East China's Shandong province, after nearly one month of trans-theater training in the far seas.

The training was a routine arrangement in the annual plan, featuring a long duration, many subjects, high intensity and complicated air and sea situations, said a military statement, noting that the formation's far seas training in real combat conditions has improved and its integrated combat capability has got tested.