专业服务板块9月12日跌0.76%，实朴检测领跌，主力资金净流出4878.81万元

Core Viewpoint - The professional services sector experienced a decline of 0.76% on September 12, with Shijiazhuang Testing leading the losses [1] Group 1: Market Performance - The Shanghai Composite Index closed at 3883.69, up 0.22% [1] - The Shenzhen Component Index closed at 12996.38, up 0.13% [1] Group 2: Capital Flow - The professional services sector saw a net outflow of 48.79 million yuan from main funds [2] - Retail investors experienced a net outflow of 22.27 million yuan [2] - Speculative funds recorded a net inflow of 71.06 million yuan [2]