On December 24th, the three major indexes rebounded in early trading, and the overall pattern was volatile. Individual stocks rose and fell nearly half. As of the noon close, the Shanghai index rose by 0.68%, the Shenzhen Composite Index rose by 0.71%, and the growth enterprises market index rose by 0.61%. On the disk, some subject stocks were active. The concept of PEEK materials rose sharply, and Zhongxin fluorine materials rose by the daily limit; the concept of copper cable high-speed connec...