China High Speed Transmission Equipment Group Co., Ltd. (stock short name: C Transmission, stock code: 00658) has issued a notice convening an Extraordinary General Meeting for 3:00 p.m. on 31 March 2026 at the Wuyi Ballroom, Grand Wuji Hotel – the Unbound Collection by Hyatt, No. 119 Software Avenue, Nanjing, Jiangsu Province.

Key resolutions 1. Immediate removal of the current auditor, HLB Hodgson Impey Cheng Limited. 2. Conditional on Resolution 1 being approved, appointment of Prism Hong Kong Limited as the Company’s new auditor to serve until the conclusion of the next annual general meeting, with the Board authorised to fix its remuneration.

Shareholder participation and voting • All resolutions will be decided by poll in accordance with Hong Kong Listing Rules. • Shareholders recorded on the register of members from 26 March 2026 to 31 March 2026 (both days inclusive) are entitled to attend and vote. • Transfer documents must be lodged with Computershare Hong Kong Investor Services Limited by 4:30 p.m. on 25 March 2026 to qualify for attendance. • Proxy forms must be deposited at Computershare not less than 48 hours before the meeting; submitting a proxy does not preclude shareholders from attending and voting in person.

Board composition (as of the notice date) Executive Directors: Hu Yueming, Li Zubin Non-executive Director: Ye Xingming Independent Non-executive Directors: Jiang Jianhua, Lau Jing Yeung William, Lu Yuanzhu, Tse Man Kit, Keith

The notice was authorised and issued by Executive Director Mr Li Zubin on 12 March 2026.