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Youyan semiconductor materials Co., Ltd. (hereinafter referred to as Youyan silicon stock) is a joint-stock company established by Beijing General Research Institute of nonferrous metals in 1999 with its national engineering research center of semiconductor materials, infrared materials research institute and 50% of the equity of Beijing Jinxin semiconductor materials Co., Ltd. as the sole investment, which was registered and established on March 12 and launched in Shanghai on March 19 Haihai stock exchange was listed, raising 550 million yuan, with the stock code of 600206.
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