Core Viewpoint - Several listed companies in the Shanghai and Shenzhen markets announced significant updates, including changes in control, regulatory measures, and sales performance, which may present investment opportunities and risks for investors [2]. Company Announcements - Zhongying Electronics announced that its controlling shareholder is planning a change in control, leading to a suspension of trading from June 9, 2025, for up to two trading days [3]. - ST Lutong received an administrative regulatory measure from the Jiangsu Securities Regulatory Bureau due to internal control deficiencies and failure to disclose significant lawsuits and account freezes [4]. - Lianhua Technology clarified that it does not directly produce chlorantraniliprole and that the related matters have limited impact on its overall business [5]. - Longshen Rongfa's subsidiary received a CNAS laboratory accreditation certificate, which is expected to positively influence future operations, though it will not significantly impact current performance [6]. Sales Performance - Yisheng Co. reported a significant increase in May sales of breeding pigs, with a total of 10,849 heads sold, representing a year-on-year increase of 207.08% [7]. Shareholding Changes - Shentong Technology's shareholder, Biheng Investment, plans to reduce its stake by up to 3%, equating to a maximum of 12.88 million shares [8]. - Ruoyuchen's shareholder, Langzi Co., intends to reduce its stake by up to 3%, not exceeding 4.7681 million shares [9]. - Oujing Technology's shareholder, Wanzhao Huigu, plans to reduce its stake by up to 3%, equating to a maximum of 5.7722 million shares [10]. - Jindan Technology's shareholder, Guangzhou Chengxin, plans to reduce its stake by up to 2.93%, equating to a maximum of 5.635 million shares [11]. - Huashu Gaoke's shareholder, Guotou Chuangye Fund, plans to reduce its stake by up to 2.2%, equating to a maximum of 9.1117 million shares [12]. - Zhongke Soft's shareholder, Kesuan Chuangyuan, plans to reduce its stake by up to 2%, equating to a maximum of 16.6208 million shares [13]. - Hengrun Co. announced multiple shareholders planning to reduce their stakes, with total reductions not exceeding 1.89% of the company's shares [14]. - Del Shares' shareholder, Wuxu 15 Fund, plans to reduce its stake by up to 1.987%, equating to a maximum of 3 million shares [15]. - Jian Ke Yuan's shareholder, Jian Ke Investment, plans to reduce its stake by up to 1% [17]. - Mindong Electric's shareholder, Fujian Investment Development Group, plans to reduce its stake by up to 1% [18]. - Puli Software's chairman and executives plan to reduce their stakes by a total of up to 0.69% [19].

Group 1 - Zhongying Electronics' controlling shareholder is planning a change in control, leading to a stock suspension starting June 9, 2025, for up to 2 trading days [3] - Lianhua Technology clarified that it does not directly produce chlorantraniliprole, and the related matters have limited impact on the company's overall performance [4] - Longshen Rongfa's subsidiary received CNAS laboratory accreditation, which is expected to positively influence future operations, though it will not significantly impact current performance [5] Group 2 - Yisheng Co. reported May sales of breeding pigs at 10,849 heads, a year-on-year increase of 207.08%, with significant sales increases attributed to delayed orders from April [7] - Shentong Technology's shareholder plans to reduce its stake by up to 3%, amounting to no more than 12.88 million shares [9] - Ruoyuchen's major shareholder intends to reduce its stake by up to 3%, not exceeding 476.81 million shares [10] Group 3 - Oujing Technology's major shareholder plans to reduce its stake by up to 3%, not exceeding 577.22 million shares [12] - Jindan Technology's shareholder plans to reduce its stake by up to 2.93%, amounting to no more than 563.5 million shares [13] - Huashu Gaoke's shareholder intends to reduce its stake by up to 2.2%, not exceeding 911.17 million shares [14] Group 4 - Zhongke Soft's major shareholder plans to reduce its stake by up to 2%, not exceeding 16.62 million shares [15] - Hengrun Co.'s shareholders plan to collectively reduce their stake by up to 1.89%, with specific reductions from various shareholders [16] - Del Shares' shareholder plans to reduce its stake by up to 1.987%, not exceeding 3 million shares [17] Group 5 - Jianke Institute's shareholder plans to reduce its stake by up to 1%, not exceeding 146.66 million shares [18] - Mindong Electric's shareholder plans to reduce its stake by up to 1%, not exceeding 457.95 million shares [19] - Puli Software's chairman and executives plan to collectively reduce their stake by up to 0.69% [20]

Group 1 - The major shareholder, Shenzhen JianKe Investment Co., Ltd., plans to reduce its stake in Shenzhen Architectural Science Research Institute Co., Ltd. by up to 1,466,600 shares, representing 1.00% of the total share capital, between July 1, 2025, and September 30, 2025 [1] - The current shareholding of JianKe Investment is 8,816,600 shares, which accounts for 6.01% of the company's total share capital [1] - The reduction will be conducted through centralized bidding, and any reduction within a continuous 90-day period will not exceed 1.00% of the total share capital [1]

Group 1 - The core point of the article is that the shareholder, JianKe Investment, plans to reduce its stake in JianKe Institute by up to 1% between July 1 and September 30, 2025 [1] - JianKe Investment currently holds 6.01% of the company's shares [1] - The reason for the reduction is due to the shareholder's own funding needs, and the shares to be sold are from those issued before the initial public offering [1]

证券代码：300675 证券简称：建科院 公告编号：2025-019 深圳市建筑科学研究院股份有限公司 关于持股 5%以上股东减持股份的预披露公告 持股 5%以上的股东深圳市建科投资股份有限公司保证向公司提供的信 息内容真实、准确、完整，没有虚假记载、误导性陈述或重大遗漏。 2. 股份来源：首次公开发行前已发行的股份。 3. 减持股份数量、方式及比例：建科投资计划通过集中竞价交易方式，减持 公司股份不超过 1,466,600 股（占公司总股本比例 1.00%），且任意连续 90 个自 然日内减持股份总数不超过公司股份总数的 1.00%，若减持计划期间公司发生送 股、资本公积金转增股本等股本变动事项，则前述减持股份比例不变，减持股份 数量进行相应调整。 4. 减持期间（自减持计划披露公告之日起十五个交易日后且不超过 3 个月）： 2025 年 7 月 1 日至 2025 年 9 月 30 日，法律法规禁止减持的期间除外。 公司及董事会全体成员保证信息披露的内容真实、准确、完整，没有虚假 记载、误导性陈述或重大遗漏。 特别提示： 持有深圳市建筑科学研究院股份有限公司（以下简称公司）股份 8,816,600 股（占 ...

Core Viewpoint - Guangdong Institute of Building Science Group Co., Ltd. has established the Guangdong Provincial Housing Safety Management Technology Center to promote technological innovation and management enhancement in the field of housing safety throughout its lifecycle [1] Group 1: Company Overview - Guangdong Institute of Building Science, founded in 1958, specializes in construction engineering inspection and testing services, forming a professional system that includes standards, measurement, inspection, testing, and certification [1] - The company has developed into one of the leading institutions in China for engineering inspection and testing qualifications and capabilities, covering five major sectors: housing construction and municipal, transportation, water conservancy, energy conservation and environmental protection, and safety production [1] Group 2: Technological Advancements - The company has made significant breakthroughs in technology research and development, focusing on safety, green, low-carbon, and smart directions, providing strong technical support for the construction of the Guangdong-Hong Kong-Macao Greater Bay Area [1] - Guangdong Institute has successfully undertaken inspection and testing technical services for major projects such as the Hong Kong-Zhuhai-Macao Bridge and Guangzhou International Finance Center, showcasing its leading position and professional technical advantages in complex engineering testing [1][2] Group 3: Future Outlook - The company aims to continue its commitment to "innovative development and serving society," increasing investment in technological innovation to promote high-quality development in the construction industry [3] - By 2025, the company’s subsidiary successfully obtained laboratory accreditation from the Hong Kong Innovation and Technology Commission, providing solid technical support for the Greater Bay Area construction [3]

Core Insights - The company reported a total revenue of 41.66 million yuan for Q1 2025, a decrease of 16.29 million yuan compared to the same period last year, representing a year-on-year decline of 28.11% [1] - The net profit attributable to shareholders was -35.52 million yuan, down by 13.22 million yuan from the previous year [1] - The net cash flow from operating activities was -55.78 million yuan, a decrease of 8.37 million yuan year-on-year [1] Financial Ratios - The latest debt-to-asset ratio is 58.57%, an increase of 1.11 percentage points from the previous quarter and 3.38 percentage points from the same period last year [3] - The latest gross profit margin is -11.57%, a decrease of 48.94 percentage points from the previous quarter and 23.35 percentage points year-on-year [3] - The latest return on equity (ROE) is -6.23%, down by 2.54 percentage points from the same period last year [3] Earnings Per Share and Turnover - The diluted earnings per share is -0.24 yuan, a decrease of 0.09 yuan compared to the same period last year [3] - The total asset turnover ratio is 0.03 times, a decrease of 0.01 times year-on-year, representing a decline of 31.07% [3] - The inventory turnover ratio is 774.00 times, a decrease of 64.90 times from the previous year, reflecting a year-on-year decline of 7.74% [3] Shareholder Information - The number of shareholders is 16,800, with the top ten shareholders holding 76.88 million shares, accounting for 52.42% of the total share capital [3] - The largest shareholder is Shenzhen Capital Operation Group Co., Ltd., holding 42.81% of the shares [3]

Financial Performance - The company reported a basic earnings per share of -0.2421 yuan for Q1 2025, a decrease of 59.28% compared to -0.1520 yuan in Q1 2024 [1] - The net profit for Q1 2025 was -0.36 billion yuan, representing a decline of 63.64% from -0.22 billion yuan in Q1 2024 [1] - Operating revenue decreased by 27.59% to 0.42 billion yuan in Q1 2025 from 0.58 billion yuan in Q1 2024 [1] - The return on equity was -6.05% in Q1 2025, down from -3.62% in Q1 2024, indicating a significant decline in profitability [1] Shareholder Structure - The top ten unrestricted shareholders hold a total of 76.8837 million shares, accounting for 52.42% of the circulating shares, with a decrease of 1.0652 million shares compared to the previous period [1] - Shenzhen Capital Operation Group Co., Ltd. remains the largest shareholder with 62.8571 million shares, unchanged from the previous report [2] - New entrants among the top shareholders include Li Bin, Lü He Wu, Wu Yan Lin, Yang Dong, and Shen Zhen Hua, while Yu Wei Guo, Yuan Tie Yi, Chi Xiang Rong, and Ou Yu have exited the top ten [2] Dividend Policy - The company has decided not to distribute dividends or transfer shares in the current period [3]

深圳市建筑科学研究院股份有限公司（以下简称公司）第四届监事会第五次 临时会议通知于 2025 年 4 月 22 日以电子邮件方式送达各位监事。会议由监事会 主席余述胜先生召集及主持，在保证所有监事充分表达意见的情况下，以通讯表 决方式召开并于 2025 年 4 月 27 日完成表决，应到监事 5 名，实到监事 5 名。 会议的召开符合《中华人民共和国公司法》《中华人民共和国证券法》（以下 简称《证券法》）《公司章程》及《公司监事会议事规则》等相关规定。 监事会会议审议情况 会议通过如下决议： 审议通过《公司 2025 年第一季度报告》 证券代码：300675 证券简称：建科院 公告编号：2025-018 深圳市建筑科学研究院股份有限公司 第四届监事会第五次临时会议决议公告 公司及监事会全体成员保证信息披露的内容真实、准确、完整，没有虚假 记载、误导性陈述或重大遗漏。 监事会会议召开情况 表决结果：赞成 5 票，反对 0 票，弃权 0 票。 审议通过《公司 2025 年度全面风险管理暨风险评估报告》 监事会同意《公司 2025 年度全面风险管理暨风险评估报告》。 1 监事会根据《证券法》第八十二条规定和中国证监 ...

具体内容详见公司于同日在巨潮资讯网（http://www.cninfo.com.cn）披露的 《公司 2025 年第一季度报告》（公告编号：2025-016）。 证券代码：300675 证券简称：建科院 公告编号：2025-017 深圳市建筑科学研究院股份有限公司 第四届董事会第七次临时会议决议公告 公司及董事会全体成员保证信息披露的内容真实、准确、完整，没有虚假 记载、误导性陈述或重大遗漏。 董事会会议召开情况 深圳市建筑科学研究院股份有限公司（以下简称公司）第四届董事会第七次 临时会议通知已于 2025 年 4 月 22 日以电子邮件方式送达各位董事，并抄送监事 会、副总经理（含董事会秘书）及董事会办公室主任。会议由董事长叶青女士召 集及主持，在保障所有董事充分表达意见的情况下，以通讯表决方式召开并于 2025 年 4 月 27 日完成表决，董事应到 9 名，实到 9 名。 会议的召开符合《中华人民共和国公司法》及有关法律、行政法规、部门规 章、规范性文件和《公司章程》《公司董事会议事规则》的规定。 董事会会议审议情况 会议通过如下决议： 审议通过《公司 2025 年第一季度报告》 董事会同意《公司 20 ...