Group 1 - The stock price of Baiyang Co., Ltd. closed at 6.22 yuan on July 31, down 0.18 yuan, representing a decline of 2.81% [1] - The trading volume on the same day was 124,448 hands, with a transaction amount of 0.78 billion yuan [1] - Baiyang Co., Ltd. is primarily engaged in the agricultural, animal husbandry, and fishery sectors, and operates in multiple concept areas including prepared dishes and cosmetics [1] Group 2 - On July 31, the company announced a change in its accounting firm from Xinyong Zhonghe to Daxin Accounting Firm, with total audit fees amounting to 1.35 million yuan [1] - This change is subject to approval at the extraordinary shareholders' meeting scheduled for August 18 [1] - The company also announced the approval of a proposal to grant reserved restricted stock to incentive targets on the same day [1] Group 3 - On July 31, the net outflow of main funds was 12.49 million yuan, accounting for 0.6% of the circulating market value [2]

Market Overview - The Shanghai Composite Index closed at 3380.82 points, down 0.68%, with a trading volume of 461.29 billion yuan [1] - The Shenzhen Component Index closed at 10186.45 points, down 1.62%, with a trading volume of 691.11 billion yuan [1] - The ChiNext Index closed at 2043.25 points, down 1.91%, with a trading volume of 315.82 billion yuan [1] - The total trading volume of both markets was 1152.41 billion yuan, a decrease of 164.34 billion yuan compared to the previous trading day [1] Sector Performance - Strong sectors included beauty care, coal, and agriculture, while sectors like computing, communication, and electronics saw significant declines [2] - The beauty care and synthetic biology concepts showed active performance, with 1276 stocks rising and 3726 stocks falling [2] - The number of stocks hitting the daily limit up was 77, while 12 stocks hit the limit down [2] Individual Stock Highlights - *ST Yazhen recorded 8 consecutive limit-up days, the highest among stocks [5] - The stock with the highest limit-up order volume was Ningbo Shipping, with 135 million shares [2] - 11 stocks had limit-up order amounts exceeding 100 million yuan, with Ningbo Shipping leading at 549 million yuan [3] Fund Flow Analysis - The net outflow of main funds from the Shanghai and Shenzhen markets was 53.115 billion yuan, with the ChiNext seeing a net outflow of 18.545 billion yuan [6] - The pharmaceutical sector saw the highest net inflow of main funds, totaling 704 million yuan, followed by beauty care and coal [6] - 29 stocks received net inflows exceeding 100 million yuan, with Chuaning Biological leading at 563 million yuan [9][10] Institutional Activity - Institutions had a net sell of approximately 664 million yuan, with the highest net buy in Aerospace Nanhu at about 30.1 million yuan [15][16] - The stock with the highest net sell by institutions was Youfu Co., with a net outflow of 146 million yuan [15][17]