Securities code: 688082 Securities abbreviation: Shengmei Shanghai Announcement No.: 2025-018

Announcement of Shengmei Semiconductor Equipment (Shanghai) Co., Ltd. on the resignation of directors and deputy general managers and the adjustment of core technical personnel

The board of directors and all directors of the company guarantee that there are no false records, misleading statements or material omissions in the content of this announcement, and assume legal responsibility for the authenticity, accuracy and completeness of its content in accordance with the law.

Important Content Notes:

RESIGNATION OF DIRECTORS: DIRECTORS HAIPING DUN, STEPHEN SUN-HAI CHIAO AND LUO QIANLI OF SHENGMEI SEMICONDUCTOR EQUIPMENT (SHANGHAI) CO., LTD. (HEREINAFTER REFERRED TO AS THE "COMPANY") APPLIED FOR RESIGNATION FROM THE COMPANY'S DIRECTORS AND RELEVANT COMMITTEES OF THE BOARD OF DIRECTORS DUE TO PERSONAL REASONS, AND WILL NO LONGER HOLD ANY POSITIONS IN THE COMPANY AFTER THEIR RESIGNATION.

RESIGNATION OF DEPUTY GENERAL MANAGER: SOTHEARA CHEAV, DEPUTY GENERAL MANAGER OF THE COMPANY, APPLIED FOR RESIGNATION FROM THE POSITION OF DEPUTY GENERAL MANAGER OF THE COMPANY DUE TO REACHING THE STATUTORY RETIREMENT AGE, AND WILL NO LONGER HOLD ANY POSITION IN THE COMPANY AFTER HIS RESIGNATION.

ADJUSTMENT OF CORE TECHNICAL PERSONNEL: DUE TO THE ADJUSTMENT OF THE WORK RESPONSIBILITIES OF THE COMPANY'S CHAIRMAN HUI WANG, THE COMPANY NO LONGER RECOGNIZES HIM AS THE COMPANY'S CORE TECHNICAL PERSONNEL; DUE TO THE RESIGNATION OF DEPUTY GENERAL MANAGER SOTHEARA CHEAV, THE COMPANY NO LONGER RECOGNIZES HIM AS THE COMPANY'S CORE TECHNICAL PERSONNEL.

Impact Description: The above-mentioned personnel changes will not have a significant adverse impact on the normal operation, technology research and development, and core competitiveness of the company's board of directors and management.

1. Explanation of the resignation of some directors and senior management

THE BOARD OF DIRECTORS OF THE COMPANY RECENTLY RECEIVED WRITTEN RESIGNATION REPORTS FROM DIRECTORS HAIPING DUN, STEPHEN SUN-HAI CHIAO, LUO QIANLI AND THE COMPANY'S DEPUTY GENERAL MANAGER SOTHEARA CHEAV. The details are as follows:

1. HAIPING DUN applied for resignation as a director of the company, a member of the strategy committee of the board of directors and a member of the remuneration and assessment committee due to personal reasons, and HAIPING DUN will no longer hold any position in the company after his resignation;

2. STEPHEN SUN-HAI CHIAO APPLIED FOR RESIGNATION AS A DIRECTOR OF THE COMPANY AND A MEMBER OF THE STRATEGY COMMITTEE OF THE BOARD OF DIRECTORS DUE TO PERSONAL REASONS, AND STEPHEN SUN-HAI CHIAO WILL NO LONGER HOLD ANY POSITION IN THE COMPANY AFTER HIS RESIGNATION;

3. Luo Qianli applied for resignation as a director of the company and a member of the nomination committee of the board of directors for personal reasons, and Luo Qianli will no longer hold any position in the company after his resignation;

4. DEPUTY GENERAL MANAGER SOTHEARA CHEAV APPLIED FOR RESIGNATION FROM THE POSITION OF DEPUTY GENERAL MANAGER OF THE COMPANY BECAUSE HE HAD PASSED THE RETIREMENT AGE

AFTER HIS RESIGNATION, SOTHEARA CHEAV NO LONGER HOLDS ANY POSITION IN THE COMPANY. In accordance with the relevant provisions of the Company Law and the Articles of Association, the resignation report of the above-mentioned personnel shall take effect from the date of delivery to the Board of Directors. THE RESIGNATIONS OF DIRECTORS HAIPING DUN, STEPHEN SUN-HAI CHIAO AND LUO QIANLI DID NOT RESULT IN THE BOARD OF DIRECTORS FALLING BELOW THE LEGAL MINIMUM AND WOULD NOT AFFECT THE NORMAL OPERATION OF THE COMPANY'S BOARD OF DIRECTORS. The above-mentioned persons confirm that there are no differences of opinion with the Company, the Board of Directors and the Board of Supervisors, and there are no matters related to the resignation that need to be brought to the attention of the shareholders of the Company. As of the disclosure date of this announcement, the shares held by the above-mentioned persons are as follows:

NAME: NUMBER OF SHARES (SHARES), SHAREHOLDING RATIO (%)HAIPING DUN69,2300.02STEPHEN SUN-HAI CHIAO69,2300.02 LA QIANLI 69,2300.02SOTHEARA CHEAV260,0000.06

After the resignation of the shares of the company held by the above-mentioned personnel, they will still strictly abide by the provisions of relevant laws and regulations such as the Interim Measures for the Administration of Shareholding Reduction by Shareholders of Listed Companies, the Rules for the Management of the Company's Shares Held by Directors, Supervisors and Senior Managers of Listed Companies and Their Changes.

Second, the specific situation of the adjustment of core technical personnel

(1) The specific situation of core technical personnel

HUI WANG, MALE, BORN IN NOVEMBER 1961, AMERICAN NATIONALITY, HAS PERMANENT RESIDENCY IN CHINA, PH.D. IN PRECISION ENGINEERING, AND WINNER OF THE "PUJIANG TALENT PLAN" IN SHANGHAI. From February 1994 to November 1997, he served as the manager of the R&D department of Quester Technology Inc. in the United States. Since May 1998, he has served as Chairman and Chief Executive Officer of ACMR. Since May 2005, he has served as the chairman of the board of directors of the company.

SOTHEARA CHEAV, MALE, BORN IN MARCH 1952, AMERICAN NATIONALITY, NO PERMANENT RESIDENCY IN ANOTHER COUNTRY, BACHELOR'S DEGREE IN ELECTRONIC TECHNOLOGY. He joined the company in March 2007 and successively served as the manager of the manufacturing department, the director of the manufacturing department, and the deputy general manager of the company from January 2015 to March 2025.

(2) Reasons for adjustment

1. Due to the adjustment of the work responsibilities of the chairman of the company, the company no longer recognizes him as the company's core technical personnel;

2. BECAUSE THE COMPANY'S DEPUTY GENERAL MANAGER SOTHEARA CHEAV REACHED THE STATUTORY RETIREMENT AGE AND RESIGNED FROM THE COMPANY, THE COMPANY NO LONGER RECOGNIZES HIM AS THE COMPANY'S CORE TECHNICAL PERSONNEL.

(3) Confidentiality and intellectual property rights

The Company has signed the Confidentiality and Intellectual Property Protection Agreement and the Non-compete Agreement with the above-mentioned relevant personnel, stipulating that they shall perform confidentiality obligations with respect to the Company's technical secrets and business secrets during their employment and after their resignation, and shall not disclose, transfer or make known to third parties in any way. As of the disclosure date of this announcement, the company has not found that the above-mentioned personnel have violated the confidentiality agreement.

(4) Participation in R&D and patents

THE R&D RESULTS THAT HUI WANG AND SOTHEARA CHEAV PARTICIPATED IN DURING THEIR TENURE ARE ALL JOB RESULTS, AND THEIR INTELLECTUAL PROPERTY RIGHTS ARE OWNED BY THE COMPANY, AND THERE ARE NO DISPUTES OR POTENTIAL DISPUTES INVOLVING JOB RESULTS OR INTELLECTUAL PROPERTY RIGHTS. This adjustment will not affect the integrity of the company's intellectual property rights.

Third, the impact of the adjustment of core technical personnel on the company

As a leading enterprise in the semiconductor equipment industry, the company has always attached great importance to technological innovation and talent training, and has established a complete R&D system and talent echelon, which effectively guarantees the continuity and stability of the company's technology research and development. As of the end of 2022, the end of 2023 and the end of 2024, the number of R&D personnel of the company is 519, 733 and 931 respectively, accounting for 43.29%, 46.45% and 46.50% of the total number of employees in the current period, respectively, and the number of R&D personnel of the company is showing an overall growth trend. The adjustment of the core technical personnel belongs to the company's normal personnel structure optimization, the company's existing R & D team and core technical personnel can fully support the continuous research and development and innovation of core technologies in the future, and there is no major dependence on specific technical personnel.

The list of the company's core technical personnel before and after this adjustment is as follows:

The name of the time core technician

Before this adjustment

BEFORE THIS ADJUSTMENT, HUI WANG, WANG JIAN, CHEN FUPING, SOTHEARA CHEAV, WANG JUN, LI XUEJUN

After this adjustment

After this adjustment, Wang Jian, Chen Fuping, Wang Jun, and Li Xuejun

Fourth, the measures taken by the company

The aforesaid personnel have committed to complete the handover of work in accordance with the company's regulations, and the company will ensure a smooth transition of the work for which they are responsible. HUI WANG, CHAIRMAN OF THE COMPANY, WILL CONTINUE TO SERVE AS THE CHAIRMAN OF THE COMPANY, CONTINUE TO LEAD THE COMPANY'S STRATEGIC DEVELOPMENT, AND PROVIDE GUIDANCE FOR THE COMPANY'S STEADY OPERATION AND LONG-TERM PLANNING. The company will adjust the phase in a timely manner according to business needs

work arrangements to ensure the smooth development of various tasks. At the same time, the company will continue to increase R&D investment, strengthen the construction of talent team, introduce and cultivate outstanding technical talents, so as to strengthen technological innovation capabilities and continue to enhance core competitiveness.

5. Acknowledgments

THE DIRECTORS OF THE COMPANY, HAIPING DUN, STEPHEN SUN-HAI CHIAO AND LUO QIANLI, HAVE BEEN DEDICATED AND DILIGENT DURING THEIR TENURE AND HAVE MADE POSITIVE CONTRIBUTIONS TO THE COMPANY'S STANDARDIZED OPERATION AND DEVELOPMENT, AND THE COMPANY AND THE BOARD OF DIRECTORS WOULD LIKE TO EXPRESS THEIR HEARTFELT THANKS TO THEM.

THE COMPANY AND THE BOARD OF DIRECTORS WOULD LIKE TO EXPRESS THEIR HEARTFELT GRATITUDE TO THE COMPANY FOR HER DEDICATION AND DILIGENCE DURING HER TENURE AS A SENIOR MANAGEMENT AND CORE TECHNICAL PERSONNEL, AND TO MAKE IMPORTANT CONTRIBUTIONS TO THE COMPANY'S TECHNOLOGICAL PROGRESS AND DEVELOPMENT.

The announcement is hereby made.

Shengmei Semiconductor Equipment (Shanghai) Co., Ltd

Board of Directors March 12, 2025