Today, 40 years ago, on April 15, 1985 (February 26, 1985 Calendar), the Sino-American cooperative aircraft manufacturing agreement came into force. The MD-82 aircraft produced by the Sino-American cooperation entered into force on April 15, 1985 at the Shanghai Aircraft Manufacturing Plant, with the approval of the State Council, Shanghai Aircraft Industry Corporation, China Air Equipment Corporation and the United States McDonald-Douglas Corporation on the cooperation production of MD-82 and its derivatives, joint development of advanced technology-based aircraft and compensation trade agreement and its five subsidiary agreements, which will form the foundation for the establishment of a modern civil aircraft industry base in Shanghai. This cooperation is the largest and most extensive project of cooperation between the two countries so far. The cooperation includes the transfer of advanced technology