The A-share market dropped to a three-week low on Thursday as investors took profits ahead of the National Day holiday that runs from Oct 1 to 7.

The Hong Kong market will be shut on Oct 1.

The CSI300 Index of leading shares listed in Shanghai and Shenzhen finished at 2,384.4 points, down 1.8 percent, while the Shanghai Composite Index dropped 1.9 percent - both the lowest since Sept 9.