CASTECH(SZ:002222) Xin Lang Cai Jing·2025-10-13 05:21Group 1 - The core viewpoint of the news is that Fujian Fuzhou Technology Co., Ltd. (福晶科技) has seen a stock price increase of 5.04%, reaching 51.92 CNY per share, with a trading volume of 1.388 billion CNY and a turnover rate of 5.83%, resulting in a total market capitalization of 24.415 billion CNY [1] - Fujian Fuzhou Technology, established on October 31, 2001, and listed on March 19, 2008, specializes in the research, production, and sales of optoelectronic components related to lasers and optical communications [1] - The company's main business revenue composition includes precision optical components (35.06%), nonlinear optical crystal components (24.37%), laser devices (21.49%), laser crystal components (17.27%), and others (1.80%) [1] Group 2 - From the perspective of the top ten circulating shareholders, Southern Fund's Southern CSI 1000 ETF (512100) increased its holdings by 658,900 shares in the second quarter, now holding 3.4709 million shares, which accounts for 0.74% of the circulating shares [2] - The estimated floating profit from this increase is approximately 8.6425 million CNY [2] - The Southern CSI 1000 ETF (512100), established on September 29, 2016, has a current scale of 64.953 billion CNY, with a year-to-date return of 27.87% and a one-year return of 34.65% [2]