Group 1 - The A-share market closed in 2025 with the Shanghai Composite Index at 3968.84 points, marking an annual increase of 18.41% [1] - The top-performing stock of 2025 was Shangwei New Materials, achieving a remarkable increase of over 1800% [1] - The top ten stocks in terms of performance included Shangwei New Materials, Tiangpu Co., *ST Yushun, *ST Yazhen, Shenghong Technology, Feiwo Technology, Feiling'er, Dingtai High-tech, Hengbo Co., and Shunhao Co. [1] - Shangwei New Materials and Tiangpu Co. had cumulative increases of 1821.12% and 1662.49%, respectively, while *ST Yushun and *ST Yazhen saw increases of 719.38% and 636.7% [1] - The remaining top-performing stocks had annual cumulative increases ranging from 500% to 600% [1] Group 2 - The top ten underperforming stocks were dominated by "problem stocks," with the worst performer, Guangdao Tui, experiencing a cumulative decline of 94.18% [2]

Core Viewpoint - The top-performing stocks in April include United Chemical and Guofang Group, with significant price increases of 159.09% and 117.10% respectively, amidst a general market decline [1][3]. Stock Performance Summary - **United Chemical**: Achieved a cumulative increase of 159.09% in April, with two trading days recording a 20% limit up. The company reported a revenue of 535 million yuan for 2024, a 24.80% increase year-on-year, and a net profit of 56.43 million yuan, up 66.81% [5]. - **Guofang Group**: Experienced a 117.10% increase, despite multiple risk warnings. The company reported a revenue of 757 million yuan for 2024, a 21.92% decrease, and a net profit of 58.01 million yuan, down 63.23% [6]. - **Hongbaoli**: Recorded a 104.27% increase, with eight trading days hitting the limit up. The company is undergoing technical modifications for its epoxy propylene project, which has not yet generated sales revenue [7]. - **ST Yushun**: Increased by 88.49%, with 16 trading days hitting the limit up. The company announced a significant asset restructuring involving a data center project [8]. - **Zhongqi New Materials**: Achieved an 85.72% increase, with a major share transfer that changed its controlling shareholder [9]. - **Lintai New Materials**: Increased by 84.94%, reporting a revenue of 101 million yuan for Q1 2025, a 107.43% increase, and a net profit of 38.36 million yuan, up 287.62% [10]. - **Wancheng Group**: Increased by 82.79%, reporting a revenue of 10.821 billion yuan for Q1 2025, a 124.02% increase, and a net profit of 215 million yuan, up 3344.13% [11][12]. - **Anji Food**: Increased by 76.69%, with a revenue of 607 million yuan for 2024, a 4.06% decrease, and a net profit of 38.33 million yuan, up 23.29% [13]. - **Leshan Electric Power**: Increased by 71.69%, with multiple risk warnings regarding high stock price increases [14]. - **Redick**: Increased by 70.20%, with ongoing uncertainty regarding its acquisition activities [15].