The Hang Seng Index dropped 0.2 per cent to 25,839.07 at the noon break, erasing an earlier gain of as much as 0.8 per cent to add to a 5.1 per cent loss over the past six trading days. The Hang Seng Tech Index retreated 1.3 per cent.
On the mainland, the CSI 300 Index slipped 0.1 per cent and the Shanghai Composite Index added 0.2 per cent.
Sands China sank 4.5 per cent to HK$18.18 and Galaxy Entertainment Group retreated 4 per cent to HK$36.12 after American brokerage Jefferies said Macau’s casino revenue missed expectations during the Chinese National Day holidays. Chinese chipmaker Semiconductor Manufacturing International Corp slumped 5.6 per cent to HK$75.70. Alibaba Group Holding lost 1.9 per cent to HK$159.60 and Tencent Holdings fell 1.2 per cent to HK$631.50.

Limiting the losses, Pop Mart International Group, the producer of hit plush toy Labubu, rallied 2.9 per cent to HK$268.60 and Xinyi Solar Holdings gained 5.7 per cent to HK$3.71.