突然爆发，两大板块涨停潮

Market Overview - The A-share market experienced an overall decline on October 31, with major indices showing slight decreases. The Shanghai Composite Index fell by 0.63%, the Shenzhen Component Index decreased by 0.62%, and the ChiNext Index dropped by 1.49% [3][6]. Sector Performance - The media and biopharmaceutical sectors showed resilience, with the media sector leading the gains, rising over 3%. Notable stocks within this sector, such as Fushi Holdings and Rongxin Culture, hit the 20% daily limit up [3][4]. - The biopharmaceutical sector also saw significant increases, with a nearly 2% rise, and several stocks, including Sanofi and Lianhuan Pharmaceutical, reached their daily limit up [3][5]. Notable Stocks - In the media sector, key stocks included: - Fushi Holdings (300071) at 5.08, up 0.85, a 20.09% increase - Rongxin Culture (301231) at 39.60, up 6.60, a 20.00% increase - Visual China (000681) at 22.17, up 2.02, a 10.02% increase [4]. - In the biopharmaceutical sector, significant performers included: - Sanofi (688336) at 72.96, up 12.16, a 20.00% increase - Lianhuan Pharmaceutical (600513) at 21.77, up 1.98, a 10.01% increase [5]. Declining Stocks - Several previously popular stocks, represented by "Yi Zhongtian," experienced substantial declines. For instance, Xinyi Sheng fell by 6.44%, Zhongji Xuchuang dropped by 6.94%, and Tianfu Communication saw a significant drop of 7.76% after a prior decline of 11.56% [7][8].