China's benchmark Shanghai Composite Index on the Shanghai Stock Exchange closed at 2,418.53 points on Thursday, down 15.95 points, or 0.66 percent. A Share Index: 2,531.36 points, down 16.95 points, or 0.67 percent; B Share Index: 284.40 points, up 3.50 points, or 1.25 percent; Total Turnover: 109.3 billion yuan (17.54 billion US dollars).