天机控股(01520.HK)：非执行董事郑锴炘调任为行政总裁

Group 1 - The core point of the article is the announcement of management changes at Tianji Holdings, with Zheng Kaixin resigning as a non-executive director to become the CEO effective December 24, 2025 [1] - Zheng Kaixin will focus on compliance matters and technology applications in his new role as CEO [1] - Yi Zuoxing has been appointed as the Chief Investment Officer, responsible for managing investor relations, communication, and capital operations, effective December 24, 2025 [1] Group 2 - Zeng Jing has been appointed as the Co-Chief Financial Officer, sharing financial responsibilities with the current CFO Zheng Zijian, effective December 24, 2025 [1]