Stock code: 688169 Stock abbreviation: Roborock Announcement No.: 2025-002

Beijing Stone Century Technology Co., Ltd

Announcement of the resolution of the second meeting of the third board of supervisors

The Board of Supervisors and all supervisors of the Company guarantee that there are no false records, misleading statements or major 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.

1. The convening of the meeting of the board of supervisors

Beijing Stone Century Technology Co., Ltd. (hereinafter referred to as "the Company") for the second time of the third board of supervisors

The meeting was held on January 10, 2025 in the company's conference room in an on-site and telecommunication mode.

The notice of this meeting was sent to all supervisors by email in writing and by communication on January 7, 2025. There should be 3 supervisors present at the meeting, and 3 supervisors should actually attend the meeting. The convening and convening procedures of the meeting are in accordance with the relevant laws, administrative regulations, departmental rules, normative documents and the provisions of the Articles of Association of Beijing Stone Century Technology Co., Ltd. (hereinafter referred to as the "Articles of Association"), and the resolutions of the meeting are legal and valid.

2. Deliberations of the Board of Supervisors

The meeting was presided over by Mr. Xie Haojian, Chairman of the Board of Supervisors, and Ms. Sun Jia, Secretary of the Board of Directors, attended the meeting. The supervisors at the meeting voted to approve the following matters:

(1) Reviewed and approved the "Proposal on Providing Guarantee Quota Estimates for Wholly-owned Subsidiaries"

After review, the board of supervisors believes that the company's guarantee amount for its wholly-owned subsidiaries is expected to meet actual needs and is conducive to the steady development of production and operation. The deliberation procedure of this matter is in accordance with the provisions of relevant laws and regulations, normative documents and the Articles of Association, and there is no behavior that harms the interests of the company and shareholders.

The result of the vote: 3 votes in favor, 0 votes against, 0 abstentions.

For details, please refer to the "Announcement of Beijing Stone Century Technology Co., Ltd. on the Estimated Guarantee Amount for Wholly-owned Subsidiaries" disclosed by the company on the website of the Shanghai Stock Exchange (www.sse.com.cn) on the same day.

(2) Reviewed and passed the "Proposal on Carrying out Foreign Exchange Hedging Business"

The Board of Supervisors believes that the Company and its holding subsidiaries carry out foreign exchange hedging business mainly to prevent the impact of exchange rate fluctuations in the foreign exchange market on the Company, which is in line with the Company's business development needs. The company has established effective risk control

system, and strictly implement it in accordance with the requirements. The decision-making procedures for the company to carry out foreign exchange hedging business comply with laws, regulations and the Articles of Association, and there is no harm to the interests of the company's shareholders, especially small and medium-sized shareholders. Therefore, we agree to the above.

The result of the vote: 3 votes in favor, 0 votes against, 0 abstentions.

For details, please refer to the "Announcement of Beijing Stone Century Technology Co., Ltd. on Carrying out Foreign Exchange Hedging Business" disclosed by the company on the website of the Shanghai Stock Exchange (www.sse.com.cn) on the same day.

The announcement is hereby made.

Board of Supervisors of Beijing Stone Century Technology Co., Ltd

January 11, 2025