Tunnel Corporation: Controlling shareholder City Construction Group plans to increase its stake in the company by 250 million to 500 million yuan.

Tunnel Corporation Announcement: Shareholder City Construction Group plans to increase its holdings in the company through the Shanghai Stock Exchange system, using methods such as centralized bidding, bulk trading, and asset management plans from the date of this announcement to May 15, 2026. The total amount of the increase will be no less than 250 million RMB and no more than 500 million RMB, with the number of shares held not exceeding 2% of the total share capital. There is no price range set for the increase plan, and the source of funds will be from self-owned funds and/or self-raised funds. This increase plan may face risks such as changes in the capital market or other factors leading to the inability to achieve the expected goals of the plan. The increase plan does not involve a tender offer and will not result in a change in the company's controlling shareholder or ultimate controller.