(Yicai Global) May 30 -- China's mainland stock markets fell in the morning session as traders locked in gains.

The Shanghai Composite Index declined 0.8 percent to 2,890.58 before lunch, with a turnover of CNY118.4 billion (USD17.2 billion). The Shenzhen Component Index dropped 1.3 percent to 8,896.27 on a trading volume of CNY153.4 billion. The ChiNext Index, which tracks growth enterprises in Shenzhen, lost 1.3 percent to finish the morning at 1,477.97, with a turnover of CNY47.2 billion.

Editor: Emmi Laine