中国国航中朝间客运航班恢复运营

Group 1 - The core point of the article is the resumption of passenger flights between China and North Korea, specifically the operation of Air China's flights from Beijing to Pyongyang [1] Group 2 - Air China operated a flight that arrived at Pyongyang Sunan International Airport on March 30 [1] - This marks the official restart of passenger services between China and North Korea [1]