(Yicai Global) Sept. 30 -- Stock markets on the Chinese mainland suffered this morning as investors opted to cash in their shares ahead of the week-long National Day holiday.

The Shanghai Composite Index was down 0.4 percent at 2,920.46 at the lunch break, while the Shenzhen Component Index was 0.62 percent lower at 9,489.50. The ChiNext Price Index, which tracks growth enterprises listed in Shenzhen, was 0.81 percent weaker at 1,634.26.