Shares ended higher in Hong Kong on Wednesday as bargain-buyers moved in following a painful sell-off at the start of the week, with attention on the Federal Reserve's interest rate decision later in the day.

The Hang Seng Index rose 1.1 percent, or 240 points, to 21,308.

The Shanghai and Shenzhen composite indexes both edged up 0.5 percent to 3,305 and 2,098, respectively.