Group 1: Shareholding Changes - The National Integrated Circuit Industry Investment Fund reduced its stake in Saiwei Electronics from 5.88% to 4.999986% by selling 6.4278 million shares, which is a decrease of 1% [1] - The fund previously reduced its holdings from 6.95% to 5.88% by selling 7.836718 million shares, also a decrease of 1% [1] - Jiangsu Boyun's shareholder, Blue Three Venture Capital, plans to reduce its stake by up to 1%, amounting to 971,300 shares [5] Group 2: Corporate Actions - Chenshan Technology is planning to issue A-shares to Hefei State Investment, which may lead to a change in company control, and the stock will be suspended from trading for up to 2 days [2] - Haichang New Materials intends to acquire 51% of Shenzhen Xinwei Communications for 234.6 million yuan, gaining control over the company [3] - Yuanli Co. plans to acquire 100% of Fujian Tongsheng New Materials for 470 million yuan, aiming to enhance its strategic layout in the silicon dioxide sector [4] Group 3: Share Buybacks and Increases - Mindray Medical's chairman, Li Xiting, plans to increase his stake in the company by 200 million yuan, having already purchased 152,340 shares at an average price of 196.862 yuan per share [6] Group 4: Product Approvals and Innovations - Ruipu Biotech received a new veterinary drug registration certificate for a tri-valent inactivated vaccine for cats, enhancing its competitive edge in the companion animal health sector [7] - Tianli Lithium Energy obtained two invention patents related to lithium-ion battery electrode materials, which may improve its innovation capabilities [7]