A-share optical communication module concept stocks fluctuated and rose, with Zhishang Technology hitting the 20cm daily limit, Robotec rising more than 18%, and TianTong Shares, Hangzhou Electric Shares and many other stocks hitting the daily limit. Taicheng Optoelectronics rose more than 8%, and Changxin Bocheng, Guangku Technology, Feikai Materials and other stocks followed suit.