People view a model of C919 aircraft at the 6th China International Advanced Materials Industry Exposition in Harbin, northeast China's Heilongjiang Province, Aug. 29, 2023. The 6th China International Advanced Materials Industry Exposition, with the theme of "Cooperate to Share New Opportunities, Innovate to Inspire New Driving Forces," kicked off in Harbin on Tuesday. (Xinhua/Zhang Tao)
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