"Half-Day Express" Hang Seng Index closed at 16,729 points, down 101 points; Hang Seng Technology Index closed at 3,779 points, down 51 points. WUXI BIO fell more than 23%, CGN Mining and EAST BUY reached new highs.

The Hang Seng Index closed at 16,729 points at midday, down 101 points or 0.6%. The Hang Seng Technology Index reported 3,779 points, down 51 points or 1.3%. The CSI 300 Index fell 35 points or 0.6% to 5,726 points. Active heavyweight stocks performed as follows: Meituan (03690.HK) closed at HKD 86.5, down 1.6%; Hong Kong Exchanges and Clearing (00388.HK) closed at HKD 275.8, down 1.4%; Alibaba (09988.HK) closed at HKD 71.15, down 1%; Ping An Insurance (02318.HK) closed at HKD 35.85, down 0.6%; AIA Group (01299.HK) closed at HKD 66.5, down 0.5%; China Construction Bank (00939.HK) closed at HKD 4.48, up 0.4%; Tencent (00700.HK) closed at HKD 319.6, up 0.2%. The following constituent stocks of the Hang Seng Index and CSI 300 Index experienced significant changes: WuXi Biologics (02269.HK) closed at HKD 33.15, down 23.8%; WuXi AppTec (02359.HK) closed at HKD 85.25, down 6.8%; CSPC Pharmaceutical (01093.HK) closed at HKD 6.77, down 5.4%; Li Ning (02331.HK) closed at HKD 20.7, down 4.8%; Zijin Mining (02899.HK) closed at HKD 12.66, up 4.3%; NetEase (09999.HK) closed at HKD 168.4, down 4.2%; ANTA Sports (02020.HK) closed at HKD 75.7, down 4.1%; Kuaishou Technology (01024.HK) closed at HKD 55.05, down 3.8%; Shun Yu (02382.HK) closed at HKD 69.8, down 3.7%; NIO (02015.HK) closed at HKD 141.3, down 3.6%; Lenovo Group (00992.HK) closed at HKD 9.91, up 3.3%. The following small and medium-sized stocks experienced significant changes: COSMOPOL INT'L (00120.HK) closed at HKD 4.82, up 15.3%; KEEP (03650.HK) closed at HKD 25, down 13.3%; Zhuguang Holdings (01176.HK) closed at HKD 0.25, down 12.3%; Boan Biotech (06955.HK) closed at HKD 16.14, down 11.7%; Kanglong Chemical (03759.HK) closed at HKD 16.34, down 11.7%; Rongchang Biotech (09995.HK) closed at HKD 40.1, down 11.2%; Beisen Energy (09669.HK) closed at HKD 3.15, down 10.3%; CGN Mining (01164.HK) closed at HKD 1.74, up 4.8%, reaching a new high; New Oriental Education (09901.HK) closed at HKD 65.55, up 1.4%, reaching a new high.