工程机械板块1月16日涨1.68%，铁拓机械领涨，主力资金净流入4.6亿元

Group 1 - The engineering machinery sector increased by 1.68% on January 16, with Tietuo Machinery leading the gains [1] - The Shanghai Composite Index closed at 4101.91, down 0.26%, while the Shenzhen Component Index closed at 14281.08, down 0.18% [1] - Key stocks in the engineering machinery sector showed significant price increases, with Tietuo Machinery rising by 10.16% to a closing price of 29.16 [1] Group 2 - The engineering machinery sector saw a net inflow of 460 million yuan from main funds, while retail investors experienced a net outflow of 554 million yuan [2] - Major stocks like Sany Heavy Industry and Aidi Precision had varying performances in terms of fund flows, with Sany Heavy Industry seeing a net inflow of 225 million yuan from main funds [3] - Aidi Precision had a net inflow of approximately 75.6 million yuan from main funds but faced a net outflow of 44.8 million yuan from retail investors [3]