通信服务板块1月8日涨0.75%，普天科技领涨，主力资金净流出2.87亿元

Group 1 - The communication services sector increased by 0.75% on January 8, with Putian Technology leading the gains [1] - The Shanghai Composite Index closed at 4082.98, down 0.07%, while the Shenzhen Component Index closed at 13959.48, down 0.51% [1] - Putian Technology's stock price rose by 7.56% to 38.42, with a trading volume of 810,400 shares and a transaction value of 3.026 billion yuan [1] Group 2 - The communication services sector experienced a net outflow of 287 million yuan from institutional investors and 390 million yuan from retail investors, while retail investors saw a net inflow of 677 million yuan [2] - Major stocks in the sector showed varied performance, with China Unicom experiencing a net inflow of 3.25 billion yuan from institutional investors, while retail investors had a net outflow of 1.49 billion yuan [3] - The stock of Sanwei Communication saw a net inflow of 271 million yuan from institutional investors but a net outflow of 201 million yuan from retail investors [3]