Opticalcommunication concept stocks opened collectively higher. As of press time, Changfei Fiber Optic Cable (06869) rose by 5.42%, trading at 175 Hong Kong dollars; Cambridge Technologies (06166) increased by 5.19%, trading at 77 Hong Kong dollars; Foxconn Interconnect Technology (06088) gained 5.05%, trading at 6.45 Hong Kong dollars; and Huiju Technology (01729) climbed 2.31%, trading at 19.5 Hong Kong dollars.