Core Viewpoint - The company has adjusted the amount of funds to be invested in its fundraising projects due to the actual net amount raised being lower than initially planned, ensuring efficient use of funds while maintaining the original purpose of the fundraising [1][2]. Fundraising Overview - The company raised a total of RMB 2,497,482,000.00 from the issuance of 295,560,000 shares at a price of RMB 8.45 per share, with a net amount of RMB 2,342,867,334.94 after deducting issuance costs of RMB 154,614,665.06 [1][2]. - All raised funds are managed in a dedicated account, with a tripartite supervision agreement signed with the sponsor and the bank [2]. Adjustment Details - The adjustment was made because the actual net amount raised was lower than the amount disclosed in the prospectus. The company plans to adjust the investment amounts for its projects while ensuring that the overall purpose of the funds remains unchanged [2][3]. - The adjusted investment amounts for the projects are as follows: - Integrated Circuit Equipment R&D Manufacturing Service Center: Adjusted from RMB 266,338,000.00 to RMB 250,000,000.00 - High-end Integrated Circuit Equipment R&D Project: Adjusted from RMB 234,286,730.00 to RMB 234,286,730.00 - Total adjusted investment: RMB 234,286,730.00 [2]. Impact of Adjustments - The adjustments made will not materially affect the normal use of the raised funds and are in compliance with relevant regulations, aligning with the company's future development strategy and benefiting all shareholders [2][3]. Review Procedures - The adjustments were approved during the company's board and supervisory meetings held on July 25, 2025, and did not require shareholder approval as they fell within the board's authority [3]. Opinions from Supervisory Board and Sponsor - The supervisory board supports the adjustments, stating they are prudent and do not affect the company's normal operations or the interests of shareholders [3]. - The sponsor has confirmed that the adjustments comply with regulatory requirements and do not change the intended use of the funds [3].

Core Viewpoint - Beijing Yitang Semiconductor Technology Co., Ltd. plans to use raised funds amounting to CNY 2,097,556,497.48 to replace self-raised funds previously invested in fundraising projects and paid issuance expenses, in compliance with relevant regulations and within six months of the funds being received [1][5][7] Summary of Fundraising Situation - The company raised a total of CNY 2,342,867,334.94 through its initial public offering (IPO) of 295,560,000 shares at a price of CNY 8.45 per share, as confirmed by KPMG Huazhen [1][2] - The raised funds are managed in a dedicated account, with a tripartite supervision agreement signed with the sponsor and the bank [1] Summary of Investment Projects - The net amount raised is lower than the initially disclosed amount in the prospectus, leading to adjustments in the investment amounts for the fundraising projects [2] - The adjusted investment amounts for the projects are as follows: - Yitang Semiconductor Integrated Circuit Equipment R&D Manufacturing Service Center: CNY 250,000,000 - Yitang Semiconductor High-end Integrated Circuit Equipment R&D Project: CNY 234,286,730 - Total adjusted investment: CNY 234,286,730 [2] Summary of Self-raised Funds and Replacement Arrangement - The actual investment amount from self-raised funds prior to the IPO was CNY 2,042,867,334.94, which the company plans to replace with the raised funds [4][6] - The total amount for replacing self-raised funds and issuance expenses is CNY 2,097,556,497.48, which includes CNY 54,689,162.54 for issuance expenses [4][5] Review Procedures - The board and supervisory committee approved the proposal to use raised funds for replacement on July 25, 2025, confirming compliance with regulatory requirements [4][6][7] - The supervisory committee and KPMG Huazhen provided opinions supporting the replacement, affirming that it does not affect the normal progress of fundraising projects or harm shareholder interests [6][7]

Core Points - The company has made adjustments to its senior management structure, specifically regarding the positions of Subhash Deshmukh and Schubert S. Chu, who will no longer serve as Vice Presidents but will continue their roles at the wholly-owned subsidiary, Mattson Technology, Inc. [1][3] - Schubert S. Chu is no longer recognized as a core technical personnel due to his position adjustment, but he remains employed at Mattson Technology, Inc. [2][3] - The company has added Fan Qiang as a new core technical personnel, recognizing his future contributions to core technology research and business development [3][4] - The adjustments in core technical personnel are part of the company's normal personnel structure optimization and will not adversely affect the company's core technology, patent ownership, or ongoing operations [5][6] Management and Technical Personnel Adjustments - The company has a total of three core technical personnel after the adjustments, which include Hao Allen Lu, Fan Qiang, and Lee Fook Hong [4] - The company emphasizes its commitment to research and development, having established a complete R&D system and a collaborative innovation team [4][5] - The adjustments are expected to facilitate the orderly and efficient advancement of various R&D projects and support future upgrades of core products [5][6] Company Operations and Future Outlook - The company continues to prioritize new technology and product innovation, viewing R&D as essential for maintaining competitive advantage in the global semiconductor market [5][6] - The company plans to increase R&D investment and enhance its R&D team to continuously improve its technological innovation capabilities [5][6]

Group 1 - The company, Beijing Yitang Semiconductor Technology Co., Ltd., has announced changes to its registered capital and company type, as well as amendments to its Articles of Association, which will be submitted for shareholder approval [1][4] - The registered capital has increased from RMB 2,660 million to RMB 2,955.56 million, with the total number of shares rising from 266 million to 295.56 million following the completion of its initial public offering (IPO) on July 8, 2025 [1][2] - The company type has changed from "Limited Company (Foreign Investment, Unlisted)" to "Limited Company (Foreign Investment, Listed)" after its shares were listed on the Shanghai Stock Exchange's Sci-Tech Innovation Board [2] Group 2 - The amendments to the Articles of Association include changes to the registration date and the number of shares issued, reflecting the company's IPO and the new registered capital [2][3] - The revised Articles of Association will take effect upon approval by the shareholders and will be disclosed on the Shanghai Stock Exchange's website [4][5] - The company will seek authorization from the shareholders to allow the board of directors to handle the necessary business registration changes related to these amendments [4]

一、 监事会会议召开情况 北京屹唐半导体科技股份有限公司（以下简称"公司"）第二届监事会第十 三次会议于 2025 年 7 月 25 日以现场会议的方式在公司会议室召开，会议通知及 相关材料于 2025 年 7 月 18 日以电子邮件方式送达公司全体监事。本次会议由监 事会主席元巍先生主持，应到监事 3 人，实到监事 3 人，董事会秘书单一先生列 席了本次会议。本次监事会的召集、召开和表决程序符合《中华人民共和国公司 法》等有关法律法规及《北京屹唐半导体科技股份有限公司章程》的规定。 二、监事会会议审议情况 经全体监事审议，会议表决情况如下： （一）审议并通过《关于调整募集资金投资项目拟投入募集资金金额的议 案》 证券代码：688729 证券简称：屹唐股份 公告编号：2025-002 北京屹唐半导体科技股份有限公司 第二届监事会第十三次会议决议公告 本公司监事会及全体监事保证本公告内容不存在任何虚假记载、误导性陈述 或者重大遗漏，并对其内容的真实性、准确性和完整性依法承担法律责任。 具体内容详见公司同日在上海证券交易所网站（www.sse.com.cn）及指定信 息披露媒体披露的《关于使用募集资金置换预先投入 ...

国泰海通证券股份有限公司（以下简称"保荐机构"）作为北京屹唐半导体 科技股份有限公司（以下简称"公司"）首次公开发行股票并在科创板上市及持 续督导阶段的保荐机构，根据《证券发行上市保荐业务管理办法》《上市公司募 集资金监管规则》《上海证券交易所科创板股票上市规则》及《上海证券交易所 科创板上市公司自律监管指引第 1 号——规范运作》等法律法规、规范性文件的 规定，对公司使用募集资金置换预先投入募集资金投资项目（以下简称"募投项 目"）及已支付发行费用的自筹资金的事项进行了审慎核查，具体情况如下： 一、募集资金基本情况 根据中国证券监督管理委员会出具的《关于同意北京屹唐半导体科技股份有 限公司首次公开发行股票注册的批复》（证监许可[2025]467 号），并经上海证券 交易所同意，公司首次公开发行人民币普通股（A 股）股票（以下简称"本次发 行"）295,560,000 股，每股发行价格为人民币 8.45 元，募集资金总额 2,497,482,000.00 元，扣除发行费用 154,614,665.06 元（不含增值税）后，募集资 金净额为 2,342,867,334.94 元，以上募集资金已经毕马威华振会计师 ...

北京屹唐半导体科技股份有限公司 以自筹资金预先投入募集资金投资项目及支付发行费用情况报告的鉴证报告 KPMG Huazhen LLP 8th Floor, KPMG Tower Oriental Plaza 1 East Chang An Avenue Beijing 100738 China Telephone +86 (10) 8508 5000 Fax +86 (10) 8518 5111 Internet kpmg.com/cn KPMG Huazhen LLP 8th Floor, KPMG Tower Oriental Plaza 1 East Chang An Avenue Beijing 100738 China Telephone +86 (10) 8508 5000 Fax +86 (10) 8518 5111 Internet kpmg.com/cn KPMG Huazhen LLP 8th Floor, KPMG Tower Oriental Plaza 1 East Chang An Avenue Beijing 100738 China Telephone +86 (10) 850 ...

国泰海通证券股份有限公司 关于北京屹唐半导体科技股份有限公司 调整部分高级管理人员、核心技术人员的核查意见 国泰海通证券股份有限公司（以下简称"保荐机构"）作为北京屹唐半导体 科技股份有限公司（以下简称"公司"）首次公开发行股票并在科创板上市及持 续督导阶段的保荐机构，根据《证券发行上市保荐业务管理办法》《上海证券交 易所科创板股票上市规则》及《上海证券交易所科创板上市公司自律监管指引第 1 号——规范运作》等法律法规、规范性文件的规定，对公司调整部分高级管理 人员、核心技术人员的事项进行了审慎核查，具体情况如下： 一、高级管理人员、核心技术人员调整的具体情况 Schubert S. Chu，男，1973 年出生，1991 年 9 月至 1999 年 5 月，就读于 1 University of California at Berkeley（加利福尼亚大学伯克利分校）机械工程专业， 取得理学学士、硕士及博士学位。1999 年至 2007 年，任应用材料多个技术与支 持岗位；2007 年至 2012 年，任应用材料产品管理总监；2012 年至 2017 年，任 应用材料 EPI 产品总监；2017 年至 20 ...

国泰海通证券股份有限公司 关于北京屹唐半导体科技股份有限公司 调整募集资金投资项目拟投入募集资金金额的核查意见 国泰海通证券股份有限公司（以下简称"保荐机构"）作为北京屹唐半导体 科技股份有限公司（以下简称"公司"）首次公开发行股票并在科创板上市及持 续督导阶段的保荐机构，根据《证券发行上市保荐业务管理办法》《上市公司募 集资金监管规则》《上海证券交易所科创板股票上市规则》及《上海证券交易所 科创板上市公司自律监管指引第 1 号——规范运作》等法律法规、规范性文件的 规定，对公司调整募集资金投资项目（以下简称"募投项目"）拟投入募集资金 金额的事项进行了审慎核查，具体情况如下： 一、募集资金基本情况 根据中国证券监督管理委员会出具的《关于同意北京屹唐半导体科技股份有 限公司首次公开发行股票注册的批复》（证监许可[2025]467 号），并经上海证券 交易所同意，公司首次公开发行人民币普通股（A 股）股票（以下简称"本次发 行"）295,560,000 股，每股发行价格为人民币 8.45 元，募 集资金总额 2,497,482,000.00 元，扣除发行费用 154,614,665.06 元（不含增值税）后，募 ...

北京屹唐半导体科技股份有限公司 投资者关系管理制度 第一章 总则 1 第二章 投资者关系管理的内容和方式 第四条 投资者关系管理的工作对象： 第一条 为加强北京屹唐半导体科技股份有限公司（以下简称公司）与投资者 及潜在投资者（以下简称投资者）之间的信息沟通，增进投资者对公司的了解与 认同，提高公司的诚信度，进一步完善公司治理结构，根据《中华人民共和国公 司法》《中华人民共和国证券法》、中国证券监督管理委员会（以下简称中国证监 会）《上市公司投资者关系管理工作指引》《上海证券交易所科创板股票上市规则》 《上海证券交易所科创板上市公司自律监管指引第 1 号——规范运作》等法律、 法规、规章、规范性文件及《北京屹唐半导体科技股份有限公司章程》（以下简 称《公司章程》）的有关规定，结合公司实际情况，制定本制度。 第二条 投资者关系管理是指公司通过便利股东权利行使、信息披露、互动交 流和诉求处理等工作，加强与投资者及潜在投资者之间的沟通，增进投资者对公 司的了解和认同，以提升公司治理水平和企业整体价值，实现尊重投资者、回报 投资者、保护投资者目的的相关活动。 第三条 投资者关系管理的基本原则： （一） 合规性原则。公司 ...