Group 1 - The article discusses various companies' shareholder activities, including planned share reductions and increases [2] - Youzu Network's shareholders plan to reduce their holdings by up to 2.99% [2] - Huamao Technology's controlling shareholder intends to increase their stake by 100 million to 200 million yuan [2] - Tongyu Heavy Industry's actual controller will change from Zhuhai State-owned Assets Supervision and Administration Commission to Shandong State-owned Assets Supervision and Administration Commission, with a resumption of trading on May 7 [2] - Yunda Holdings' controlling shareholder also plans to increase their stake by 100 million to 200 million yuan [2] - The article mentions adjustments in convertible bonds, with Shouhua Convertible Bond not undergoing a bottom adjustment, while Yuxing and Shengxun Convertible Bonds will not be adjusted [2] - Hanbang Technology is mentioned in the context of new stock subscriptions on the Shanghai and Shenzhen exchanges [2]