金山云美股盘前一度跌超7%，公司此前宣布拟配售2.82亿股普通股

Group 1 - The core point of the article is that Kingsoft Cloud's stock price fell over 7% in pre-market trading after announcing a plan to issue 282 million shares of common stock [1] - 80% of the proceeds from the share placement will be used to support artificial intelligence business, including expanding infrastructure and enhancing cloud service capabilities [1] - The remaining 20% of the proceeds will be allocated for working capital and other corporate purposes [1]