Advanced Technology & Materials Co., Ltd. (SZSE:000969) agreed to acquire additional 11.85% stake in HeYe Special Steel Co., Ltd. from Sumitomo Corporation (China) Holding Ltd. for CNY 84.5 million on December 18, 2023. As of October 2023, HeYe Special Steel Co., Ltd. generated total assets of CNY 1.5 billion and net assets of CNY 933.16 million.