Notice of the First Extraordinary Shareholders' Meeting in 2026

The Company will hold the 1st Extraordinary General Meeting of 2026 at 16:00 on 11 June 2026. Meeting agenda: 1. Public issuance of corporate bonds Meeting attendees: 1. A-share holders registered at CSDC Shenzhen after the close of trading on 08 June 2026 are entitled to vote. Original notarized power of attorney for voting is required. 2. Directors of the board, supervisors of the supervisory committee, senior executives and appointed lawyers are entitled to attend the meeting. Registration period: from 09 June 2026 to 09 June 2026 The Company's shareholder may choose to vote online via the trading system of Shenzhen Stock Exchange or via the website of http://wltp.cninfo.com.cn. Part I Voting via the trading system Voting date: 11 June 2026 Voting code:362967 Voting abbreviation:GRG Metrology voting Voting process: 1. To input the "buy" instruction to begin voting 2. To input the serial number of the Investors Meeting proposals under the item of "subscription price" "1 share" for voting for, "2 shares" for voting against and "3 shares" for "abstention". Part II Voting via the internet Shareholders may choose the CA (certification authority) or service password for identity verification. As to the service password, shareholders may apply for a password on the website http://www.szse.cn or http://wltp.cninfo.com.cn. Voting period: from 11 June 2026 to 11 June 2026.

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