Share indexes in China fell on Monday for a fourth day as concerns over slowing growth made investors wary ahead of data that may show the economy losing more momentum.
The Shanghai Composite Index ended down 1.7% at 1,976.3 points.
The CSI300 of leading Shanghai and Shenzhen A-share listings dropped 2.2%.
Both indexes fell to their lowest in three weeks.
Construction material and railway companies dropped. Sensitive sectors, such as banks and property, were also weak.
The Hang Seng Index in Hong Kong slipped 0.5% to 21,850.15 points. The China Enterprises Index of the top Chinese listings in Hong Kong fell 1.2%.
At $US5.4 billion, turnover in Hong Kong was at its second lowest this year and 23% below its average in the past 20 sessions.