Group 1 - Company received a notice regarding the detention of Chairman Li Wei by the Tianjin Binhai New Area Supervisory Committee [2] - The board of directors convened on September 29 to appoint Deputy General Manager Zhang Min to assume the responsibilities of Chairman and legal representative [4] - The company maintains that its operations and management are normal, with all other directors and senior management continuing their duties [4] Group 2 - Company reported a decline in performance for the first half of the year, with revenue of 128 million yuan, a year-on-year decrease of 18.48% [6] - The net profit attributable to shareholders was 12.19 million yuan, down 51.64% year-on-year [6] - The company specializes in the research, design, production, and sales of key equipment for train operation control systems, achieving the highest safety integrity level SIL4 for its products [6]

Group 1 - Company Chairman Li Wei has been placed under detention by the Tianjin Binhai New Area Supervisory Committee, as notified by his family [1] - The company held a board meeting on September 29, where it was decided that Vice President Zhang Min would temporarily assume the responsibilities of Chairman and legal representative [2] - The company maintains that its governance structure and internal control mechanisms are sound, and daily operations are being managed normally by the executive team [2] Group 2 - The company specializes in the research, design, production, sales, and technical support of key equipment for rail transit train operation control systems [3] - For the first half of 2025, the company reported revenue of 128 million yuan, a year-on-year decrease of 18.48%, and a net profit attributable to shareholders of 12.19 million yuan, down 51.64% year-on-year [3]