Today, the Science Innovation 50 Index closed down 1.66%. On the market, electromagnetic shielding concept stocks are strong, and Fangbang shares rose and stopped 20CM. According to the news, GB200 used silver-plated copper wire+Teflon (PTFE) shielding material for the first time due to transmission rate requirements. The high-speed connector concept soared in the afternoon, and Dingtong Technology and Huafeng Technology rose more than 6%. Copper-clad plate concept stocks rose, with new materials from South Asia up more than 4%, and PCB Concept Shengyi Electronics up more than 4%. According to the news, copper prices have continued to rise recently, and several copper clad plate manufacturers have issued price increase letters. The electronics sector weakened, and many stocks such as Haiyou New Materials, Goodway, and Mingguan New Materials fell by more than 4%.