Stock code: 688169 Stock abbreviation: Roborock Announcement No.: 2024-090

Beijing Stone Century Technology Co., Ltd

Voluntary commitments by controlling shareholders and actual controllers

Announcement of not reducing the company's shares

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

Beijing Stone Century Technology Co., Ltd. (hereinafter referred to as the "Company") was launched on December 30, 2024

The company received the "Letter of Commitment on Voluntary Commitment Not to Reduce the Company's Shares in the Next Six Months" issued by Mr. Chang Jing, the controlling shareholder and actual controller of the company, and the relevant information is hereby announced as follows:

Based on the confidence in the company's future development prospects and the recognition of the company's long-term value, and at the same time, in order to enhance the confidence of the majority of investors, and effectively maintain the stability of investors' rights and interests and the capital market, the company's controlling shareholder and actual control

Mr. Ren Changjing voluntarily undertakes that within 6 months from December 30, 2024 (December 30, 2024 to

June 29, 2025) will not reduce its holdings of the company's shares through centralized auction transactions, block transactions, etc

Portion. During the above-mentioned commitment period, if new shares are generated by the conversion of capital reserve into share capital, distribution of stock dividends, allotment of shares, etc., the commitment not to reduce holdings shall also be observed.

As of the disclosure date of this announcement, the shareholding of Mr. Chang Jing, the controlling shareholder and actual controller of the company, is as follows:

Serial No. Name of Shareholder Number of Shares Held (Shares) Shareholding Ratio

1 Chang King 38,841,008 21.03%

The Board of Directors of the Company will continue to supervise the fulfillment of the above-mentioned commitments and fulfill the information disclosure obligations in a timely manner.

The announcement is hereby made.

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

December 31, 2024