专业工程板块8月12日跌0.39%，上海港湾领跌，主力资金净流出4.91亿元

Market Overview - On August 12, the professional engineering sector declined by 0.39%, with Shanghai Port leading the drop [1] - The Shanghai Composite Index closed at 3665.92, up 0.5%, while the Shenzhen Component Index closed at 11351.63, up 0.53% [1] Stock Performance - Notable gainers in the professional engineering sector included: - Yaxiang Integration (603929) with a closing price of 38.22, up 1.84% on a trading volume of 24,400 shares and a turnover of 93.10 million yuan [1] - China Chemical (601117) closed at 8.33, up 1.83% with a trading volume of 562,300 shares and a turnover of 468 million yuan [1] - Aiman Co. (605289) closed at 39.74, up 1.77% with a trading volume of 40,100 shares and a turnover of 158 million yuan [1] - Notable decliners included: - Feiyang Aoshi (605598) with a closing price of 29.03, down 9.98% on a trading volume of 338,400 shares [2] - Zhite New Materials (300986) closed at 13.73, down 3.31% with a trading volume of 236,500 shares [2] - Baijia Technology (835857) closed at 7.68, down 3.03% with a trading volume of 82,800 shares [2] Capital Flow - The professional engineering sector experienced a net outflow of 491 million yuan from institutional funds, while retail investors saw a net inflow of 558 million yuan [2]