The Shenzhen Component Index on the Shenzhen Stock Exchange closed at 12,931.21 points Wednesday, grew 71.35 points, or 0.55 percent, from the previous close. A Share Index: 13,881.62 points, up 76.60 points, or 0.55 percent; B Share Index: 4,133.29 points, up 7.12 points, or 0.17 percent; Total Turnover: 116.8 billion yuan (17.1 billion U.S. dollars). 