China's major stock indices ended lower in the morning session Tuesday, with the benchmark Shanghai Composite Index down 0.50 percent at 2,583.94 points.
The Shenzhen Component Index lost 0.86 percent to end at 7,524.48 points at midday.
The ChiNext Index, tracking China's NASDAQ-style board of growth enterprises, went down 1.34 percent to 1,242.83 points in the morning session Tuesday.
The ChiNext Index, together with the Shenzhen Component Index and the Shenzhen SME (small and medium-sized enterprises) Board Index, are major indices reflecting the performance of stocks listed on the Shenzhen Stock Exchange.
The ChiNext Board, which started trading on Oct. 30, 2009, mainly lists high-tech companies and those with high growth potential.