房地产服务板块1月20日涨4.46%，新大正领涨，主力资金净流入3.44亿元

Group 1 - The real estate service sector increased by 4.46% on January 20, with Xin Dazheng leading the gains [1] - The Shanghai Composite Index closed at 4113.65, down 0.01%, while the Shenzhen Component Index closed at 14155.63, down 0.97% [1] - Key stocks in the real estate service sector showed significant price increases, with Xin Dazheng rising by 7.57% to a closing price of 14.07 [1] Group 2 - The real estate service sector saw a net inflow of 344 million yuan from institutional investors, while retail investors experienced a net outflow of 224 million yuan [2] - Major stocks like "Wo Ai Wo Jia" had a net inflow of 24.5 million yuan from institutional investors, but a net outflow of 138 million yuan from retail investors [3] - "Te Fa Service" recorded a net inflow of 54.04 million yuan from institutional investors, while retail investors had a net outflow of 69.07 million yuan [3]