Today, the SSE Science and Technology Innovation Board 50 Index fluctuated for the whole day, and closed down 0.88% at 707.59 points. In terms of the market, aviation and aerospace stocks performed actively, with Jingpin Special Decoration up more than 7%, Maixinlin and Aerospace Yuhang up more than 6%, and Chaozhuo Aerospace up nearly 3%. The semiconductor sector rose and fell, with Zhenrai Technology up more than 5%, and Shengmei Shanghai and Yuanjie Technology up more than 3%; C Longtu fell more than 10%, and Huicheng shares and Haiguang Information fell more than 4%. Biological products continued to rise, and companies such as Celon Pharma, Kangwei Century, Haichuang Pharma, and Innotek rose successively.