CPO concept oscillates and declines, Changfei Optical Fiber and Qingshan Paper Industry hit the trading limit.

In the early session, the CPO concept fluctuated and fell, Changfei Optoelectronics and Qingshan Paper Industry hit the limit down, Changxin Bochuang, Tianfutong Communication, Yuanjie Technology, Dekeli, Xinyisheng and other stocks quickly followed the decline.