上峰水泥(000672.SZ)：参股公司昂瑞微首次公开发行股票并在科创板上市申请通过上市委审议

Group 1 - The core point of the article is that Beijing Angrui Microelectronics Technology Co., Ltd. has received approval for its initial public offering (IPO) on the Sci-Tech Innovation Board, with the investment from Suzhou Industrial Park Xincheng Venture Capital Partnership (Limited Partnership) [1][2] Group 2 - Angrui Micro is a specialized integrated circuit design company focusing on RF and analog fields, recognized as a national-level "little giant" enterprise [2] - The company primarily engages in the research, design, and sales of RF front-end chips, RF SoC chips, and other analog chips, emphasizing high performance, reliability, low power consumption, and high integration [2] - Suzhou Xincheng holds a 55.60% stake in Angrui Micro through a 100 million yuan investment, with a current holding of 257,706 shares, representing 0.3452% before the IPO [2]