Hong Kong's stocks jumped 1 percent by midday, driven by hope over a potential meeting of Chinese President Xi Jinping and the United States' leader Donald Trump this week.
The index hit an intraday high of 26,495, its highest level in about half a month, before paring some gains to 26,427 at the break, up 1 percent.
The half-day main board turnover exceeded HK$156.5 billion.
The Tech Index advanced 1.5 percent to 6,149. Alibaba (9988) gained 3.2 percent, while Xiaomi (1810) fell about 3 percent.
Semiconductor-related stocks saw significant gains, and consumer shares generally climbed. Some bank stocks bucked the trend and declined.
WuXi AppTec (2359) surged about 6 percent, becoming the top-performing blue chip. The company reported a 53 percent year-on-year increase in third-quarter profit and raised its full-year revenue guidance.
Meanwhile, the Shanghai Composite Index rose 1.04 percent to 3,991 points, further nearing the 4,000-point bar and reaching a fresh over 10-year high. The Shenzhen Component Index added 1.26 percent to 13,457 points.
