BEIJING, May 20 (Xinhua) -- Chinese stocks closed mixed on Wednesday, with the benchmark Shanghai Composite Index down 0.18 percent to 4,162.18 points.
The Shenzhen Component Index was flat, closing at 15,569.98 points.
The combined turnover of these two indices totaled 2.95 trillion yuan (about 431.3 billion U.S. dollars), up 67.2 billion yuan from the previous trading day.
Shares related to semiconductor and optical fiber sectors led the gains, while stocks in the power sector led the loses.
The ChiNext Index, tracking China's Nasdaq-style board of growth enterprises, gained 0.34 percent to close at 3,921.79 points.
The STAR Composite Index, which reflects the performance of stocks on China's sci-tech innovation board, closed 2.31 percent higher at 2,198.87 points. ■
