Zheng Xing Xing Ye Ri Bao·2025-08-21 08:38Group 1 - The refining and trading sector increased by 1.7% on August 21, with Rongsheng Petrochemical leading the gains [1] - The Shanghai Composite Index closed at 3771.1, up 0.13%, while the Shenzhen Component Index closed at 11919.76, down 0.06% [1] Group 2 - On the same day, the refining and trading sector experienced a net outflow of 256 million yuan from main funds, while retail investors saw a net inflow of 288 million yuan [2] - Detailed fund flow data shows that China Petroleum (601857) had a net inflow of 40.26 million yuan from main funds, while China Petrochemical (600028) experienced a net outflow of 78.72 million yuan [2] - The table indicates varying net inflows and outflows across different companies, with notable retail inflows into companies like Guochuang High-tech (002377) and Yuxin Co., Ltd. (002986) [2]