[Selected midday news on August 31st] 1. As of midday closing, the Shanghai Stock Exchange Index fell 0.2%, the Shenzhen Component Index fell 1%, and the ChiNext Index fell 1.29%. 2. Hong Kong stocks closed at noon, with the Hang Seng Index down 0.71% and the Hang Seng Technology Index down 1.03%. 3. China's manufacturing purchasing managers' index in August was 49.8%, an increase of 0.6 percentage points from the previous month. 4. The central bank launched a 5 billion yuan 7-day reverse repurchase operation in the open market on August 31, with an operating interest rate of 1.40%. At the same time, a 447 billion yuan overnight reverse repurchase operation was carried out. 5. U.S. President Trump released an AI video on the social media platform on the evening of August 30, local time, and said that "Iran's Khark Island is being blown to pieces."