According to the Zhitong Finance App, Yunnan Copper (000878.SZ) issued an announcement. As of the disclosure date of this announcement, the implementation period of this plan to increase holdings has passed halfway. Through the Shenzhen Stock Exchange trading system, China Alcoa Group increased its A-share holdings by a total of 1.08 million shares through centralized bidding, accounting for 0.5031% of the company's total issued share capital. The implementation of this plan to increase its holdings has not yet been completed, and the China Alcoa Group will continue to increase its holdings in accordance with the holdings increase plan.