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][2]. Sector Performance - The media sector led the market with a gain of over 3%, with several stocks hitting the daily limit up. Notable stocks included Fushi Holdings (300071) and Rongxin Culture (301231), both reaching a 20% increase [3][4]. - The biopharmaceutical sector also saw significant gains, with an increase close to 2%. Stocks such as Sanofi (688336) and Lianhuan Pharmaceutical (600513) also hit the daily limit up [3][5]. Notable Stocks - In the media sector, Fushi Holdings (300071) rose to 5.08, up by 0.85, a 20.09% increase, while Rongxin Culture (301231) reached 39.60, up by 6.60, a 20% increase [4]. - In the biopharmaceutical sector, Sanofi (688336) increased to 72.96, up by 12.16, a 20% increase, and Lianhuan Pharmaceutical (600513) rose to 21.77, up by 1.98, a 10.01% increase [5]. Declining Stocks - Several previously popular stocks, including Yizhong Tian (易中天), experienced significant declines. Notable drops included Xinyi Sheng (300502) down by 6.44% and Tianfu Communication (300394) down by 7.76% [7]. Hong Kong Market - The Hong Kong market also faced a downturn, with the Hang Seng Index approaching the 26,000-point mark. Stocks like SMIC and BYD saw notable declines, while New Oriental and AIA led the gains [8][9]. Company Announcement - Fosen Pharmaceutical's stock surged by over 80% during the session after announcing the approval of its "Enzalutamide Soft Capsule" for treating specific prostate cancer conditions. This product is expected to provide more treatment options for adult patients [9][10].