BEIJING, May 18 (Xinhua) -- Chinese stocks closed lower on Monday, with the benchmark Shanghai Composite Index down 0.09 percent to 4,131.53 points.

The Shenzhen Component Index closed 0.20 percent lower at 15,530.23 points.

The combined turnover of these two indices totaled 2.89 trillion yuan (about 422.3 billion U.S. dollars), down 450.5 billion yuan from the previous trading day.

Oil and gas, memory chip and robot sectors led the gains, while those related to sports led the losses.

The ChiNext Index, tracking China's Nasdaq-style board of growth enterprises, lost 0.36 percent to close at 3,914.88 points.

The STAR Composite Index, which reflects the performance of stocks on China's sci-tech innovation board, closed 0.95 percent higher at 2,094.47 points.  ■