Group 1 - The professional services sector increased by 0.74% on August 13, with C Guangjian Technology leading the gains [1] - The Shanghai Composite Index closed at 3683.46, up 0.48%, while the Shenzhen Component Index closed at 11551.36, up 1.76% [1] Group 2 - On the same day, the professional services sector experienced a net outflow of 207 million yuan from institutional investors, while retail investors saw a net inflow of 166 million yuan [2] - C Guangjian Technology had a net inflow of 101 million yuan from institutional investors, representing 4.86% of the total, while retail investors had a net outflow of 110 million yuan [2] - Other notable stocks included Huace Testing with a net inflow of 55.96 million yuan from institutional investors and a net outflow of 29.53 million yuan from retail investors [2]