Zheng Xing Xing Ye Ri Bao·2025-09-18 08:52Group 1 - The aviation equipment sector experienced a decline of 0.55% on September 18, with Shengnan Technology leading the drop [1] - The Shanghai Composite Index closed at 3831.66, down 1.15%, while the Shenzhen Component Index closed at 13075.66, down 1.06% [1] - Notable gainers in the aviation equipment sector included Chaozhuo Aerospace (up 7.13% to 54.98), Hangyu Technology (up 5.47% to 39.34), and ST Lihang (up 4.98% to 21.93) [1] Group 2 - Shengnan Technology saw a decline of 4.22% to close at 28.80, with a trading volume of 27,900 shares and a transaction value of 82.62 million [2] - The aviation equipment sector experienced a net outflow of 5.57 billion from main funds, while retail investors saw a net inflow of 2.97 billion [2] - The trading volume for notable decliners included Boyun New Materials (down 3.28% to 8.26) and Haitai High-tech (down 3.14% to 12.03) [2]