长川科技股价跌5.22%，国泰基金旗下1只基金重仓，持有201.45万股浮亏损失624.5万元

Group 1 - The core viewpoint of the news is that Changchuan Technology's stock has experienced a decline of 5.22%, with a current price of 56.26 CNY per share and a total market capitalization of 35.47 billion CNY [1] - Changchuan Technology, established on April 10, 2008, specializes in the research, production, and sales of integrated circuit equipment, with its main revenue sources being testing machines (57.68%), sorting machines (32.73%), and others (9.59%) [1] Group 2 - From the perspective of major fund holdings, Guotai Fund has a significant position in Changchuan Technology, with its Guotai CSI Semiconductor Materials and Equipment Theme ETF (159516) increasing its holdings by 331,300 shares in the second quarter, totaling 2.0145 million shares, which represents 3.71% of the fund's net value [2] - The Guotai CSI Semiconductor Materials and Equipment Theme ETF (159516) was established on July 19, 2023, with a current scale of 2.436 billion CNY and has achieved a year-to-date return of 22.77%, ranking 1777 out of 4222 in its category [2] - The fund manager, Ai Xiaojun, has been in the position for 11 years and 238 days, overseeing total assets of 141.859 billion CNY, with the best fund return during his tenure being 212.43% and the worst being -42.8% [2]