SHANGHAI, Sept 1 (Reuters) - China's major stock indexes opened down on Tuesday.
The CSI300 index fell 2.1 percent to 3,296.53 points at 1:28 GMT, while the Shanghai Composite Index lost 1.5 percent to 3,157.83 points.
China CSI300 stock index futures for September fell 0.5 percent, to 3,049.6, -246.93 points below the current value of the underlying index.
The Hang Seng index in Hong Kong was up 0.1 percent, at 21,692.78 points. (Reporting by Samuel Shen and Pete Sweeney; Editing by Jacqueline Wong)