Stock code: 688686 Stock abbreviation: Opt Announcement No.: 2025-003

Guangdong Opt Technology Co., Ltd

Announcement on the change of sponsor representatives for continuous supervision

The company and all members of the board of directors 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.

Guangdong Optimum Technology Co., Ltd. (hereinafter referred to as the "Company") ended on December 31, 2020

Guosen Securities Co., Ltd. (hereinafter referred to as "Guosen Securities") appointed sponsor representatives Mr. Zhang Wen and Ms. Ji Qing as the sponsor representatives for the company's initial public offering and listing on the Science and Technology Innovation Board, and was responsible for the specific continuous supervision work.

The supervision period is from 31 December 2020 to 31 December 2023. Due to the expiration of the above period after the company

The raised funds have not been used up, and Guosen Securities still needs to perform continuous supervision obligations on the company's unused raised funds.

In January 2022, due to the resignation of Ms. Ji Qing, she no longer served as the sponsor representative of the company, and Li Qinjun took the lead

He takes over as the company's sponsor representative and performs ongoing supervisory duties. After this change, the sponsor representatives responsible for the company's initial public offering are Mr. Zhang Wen and Mr. Li Qinjun. For details, please refer to the company

On January 25, 2022, the "About Changes" disclosed on the website of the Shanghai Stock Exchange (www.sse.com.cn).

Announcement on Continuous Supervision of Sponsor Representatives".

In March 2023, due to the resignation of Mr. Zhang Wen, he will no longer serve as the sponsor representative of the company, and Tang Yongbing will take the lead

He takes over as the company's sponsor representative and performs ongoing supervisory duties. After this change, the sponsor representatives responsible for the company's initial public offering project are Mr. Li Qinjun and Mr. Tang Yongbing. For details, please refer to the company

On March 25, 2023, the "About Change" disclosed on the website of the Shanghai Stock Exchange (www.sse.com.cn).

Announcement on Continuous Supervision of Sponsor Representatives".

In January 2025, the company received the "Regarding the Replacement of Guangdong Opttech Technology Shares" issued by Guosen Securities

Due to the resignation of Mr. Li Qinjun and no longer serving as the sponsor representative of the company's continuous supervision, in order to ensure the normal progress of the continuous supervision, Guosen Securities appointed Mr. Zhang Hongbin (see attached resume) to replace Mr. Li Qinjun as the company's continuous supervision

Guide the sponsor representative to continue to perform the duties of continuous supervision.

After the change of sponsor representatives, the sponsor representatives responsible for the continuous supervision of the company's initial public offering and listing on the Science and Technology Innovation Board are Mr. Tang Yongbing and Mr. Zhang Hongbin, and the continuous supervision period will end until the end of the continuous supervision obligations stipulated by the China Securities Regulatory Commission and the Shanghai Stock Exchange.

The Board of Directors of the Company would like to express its heartfelt thanks to Mr. Li Qinjun for his work during the continuous supervision of the Company's initial public offering and listing on the Science and Technology Innovation Board.

Documents for reference:

1. Letter from Guosen Securities Co., Ltd. on Replacing the Sponsor Representative of Guangdong Opta Technology Co., Ltd.'s Initial Public Offering and Listing on the Science and Technology Innovation Board;

2. Sponsor Representative Declaration and Commitment issued by Mr. Zhang Hongbin;

3. Mr. Zhang Hongbin's "China Securities Industry Practice Certificate".

The announcement is hereby made.

Board of Directors of Guangdong Opt Technology Co., Ltd

January 24, 2025

Attached: Curriculum vitae of Mr. Zhang Hongbin

Zhang Hongbin, male, is the business director of the TMT business headquarters of the investment banking department of Guosen Securities Co., Ltd., the sponsor representative, and the Chinese certified public accountant. In November 2009, he joined Ruihua Certified Public Accountants and participated in or was responsible for the completion of Jinxinong IPO, Guangtian Group IPO, Ruihe IPO, Yatai IPO, Baoying Backdoor Listing and other projects. In June 2015, he joined the investment banking department of Guosen Securities, and participated in or was responsible for the completion of the IPO of Huiwei Technology, the issuance of shares to purchase assets by Zhongguang Lightning Protection, the equity acquisition of Gree Electric Appliances, the issuance of shares by Lens Technology to specific targets in 2020, the IPO of Civil Explosion Optoelectronics, and the issuance of shares by Jingwei Huikai to specific targets.