China's A-share market reversed earlier gains on September 15 as the Shanghai Composite Index fell 0.54%, the Shenzhen Component Index lost 0.72% and the ChiNext Index dropped 1.15%. CATL fell more than 6% to its lowest level in nearly a year. Turnover across the Shanghai and Shenzhen exchanges reached 1.61 trillion yuan, down 16.5 billion yuan from the previous session and the lowest level this year, while more than 4,300 stocks declined. High oil prices, elevated interest rates and rising Middle East tensions further weakened investor activity; Brent crude moved above a level cited in the report, which was not specified. Wind power, PCB, semiconductor and cybersecurity shares remained active, while agriculture, retail and some tourism stocks weakened.