中国国航：7月29日召开董事会会议

Group 1 - The core point of the article is that Air China announced a board meeting to discuss the transfer of a spare engine to China National Aviation Holding [2] - The meeting took place on July 29, 2025, at the Air China headquarters in Shunyi District, Beijing, combining in-person and video formats [2] - For the year 2024, Air China's revenue composition is as follows: passenger transport accounts for 91.06%, other services for 4.5%, and air cargo and mail transport for 4.45% [2]