Hong Kong stocks closed lower, with the Hang Seng Index down 0.89% and the Tech Index down 0.97%. On their first day of trading, Qunhe Technology (00068.HK) surged 144% and Changguang Chenxin (03277.HK) jumped 75.5%. The optical communication sector performed strongly, with Cambridge Technology (06166.HK) rising nearly 35% and Huiju Technology (01729.HK) gaining 6.75%.