The Hang Seng Index was up 0.63 percent, or 160 points, to 25,824 at the open.
On the mainland, the Shanghai and Shenzhen Composite Indices were flat at 2,901 1,596.
However Tokyo also opened slightly higher, as positive sentiment from China’s announcement of stimulus and bargain-hunting purchases offset the effect of losses on Wall Street.
The Nikkei 225 was up 0.20 percent or 41 points at 20,497 in early trade, while the broader Topix was up 0.13 percent or 2 points at 1,491.
“Japanese shares are seen testing a rebound in the market, even if early trade is seen affected by the negative impact from falls in US shares,” Okasan Online Securities said in a commentary.
“The Chinese government’s announcement of measures to stimulate consumption will be supporting Japanese shares,” it added.
The dollar fetched 105.54 yen in early Asian trade, against 105.77 yen in New York late Tuesday.
In Tokyo, real estate firms led gains, with Mitsui Fudosan rising 2.26 percent to 2,528.5 yen and Mitsubishi Estate trading up 2.07 percent at 2,038 yen. On Wall Street, the Dow ended down 0.5 percent at 25,777. (AFP)