(Yicai Global) July 19 --  China's mainland stock markets gave back some of their earlier gains as  investors repositioned themselves to prepare for the first trading day  of Shanghai's new Nasdaq-style Star market on July 22.

The Shanghai Composite  Index climbed 0.8 percent to close at 2,924.20. The Shenzhen Component  Index finished 0.8 percent higher at 9,228.55. The ChiNext Price Index,  which tracks growth enterprises listed in Shenzhen, performed the best  with a 1.2 percent increase to reach 1,541.98.

This week, the Shanghai  Composite Index lost 0.2 percent. The Shenzhen Component Index advanced  0.2 percent. The ChiNext Price Index gained 1.6 percent. 

Editor: Emmi Laine