The Zhitong Finance App learned that optical communication concept stocks had the highest decline. As of press release, Cambridge Technology (06166.HK) fell 6.35% to HK$87; Changfei Optical Fiber Cable (06869.HK) fell 5.19% to HK$148; Zhongji Xuchuang (03308.HK) fell 4.26% to HK$864.5; Junzhi Group (01300.HK) fell 4.19% to HK$2.63.

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