The Shenzhen Component Index on the Shenzhen Stock Exchange closed at 12,917.15 points Thursday, up 1 points, or 0.01 percent, from the previous close. A Share Index: 13,866.54 points, up 1.07 points, or 0.01 percent; B Share Index: 4,340.28 points, down 55.43 points, or 1.26 percent; Total Turnover: 83.5 billion yuan (12.23 billion U.S. dollars). 