Market Overview - The engineering machinery sector experienced a decline of 1.75% on July 31, with Hengli Drilling leading the drop [1] - The Shanghai Composite Index closed at 3573.21, down 1.18%, while the Shenzhen Component Index closed at 11009.77, down 1.73% [1] Top Performers - Tianyuan Intelligent (603273) saw a significant increase of 10.02%, closing at 21.09 with a trading volume of 218,000 shares and a turnover of 455 million yuan [1] - Southern Road Machinery (603280) also rose by 10.01%, closing at 54.86 with a trading volume of 82,400 shares [1] - Changling Hydraulic (605389) increased by 9.99%, closing at 48.99 with a trading volume of 45,400 shares [1] Underperformers - Hengli Drilling (836942) experienced the largest decline, down 11.39% to 57.90 with a trading volume of 135,500 shares and a turnover of 811 million yuan [2] - Tuoshan Heavy Industry (001226) fell by 9.97%, closing at 40.00 with a trading volume of 109,400 shares [2] - Wuxin Suizhuang (835174) decreased by 7.19%, closing at 64.67 with a trading volume of 87,500 shares [2] Capital Flow - The engineering machinery sector saw a net outflow of 566 million yuan from institutional investors and 196 million yuan from speculative funds, while retail investors contributed a net inflow of 762 million yuan [2][3] - Notable capital flows include Huadong Heavy Machine (002685) with a net inflow of 17.7 million yuan from institutional investors, while Tianyuan Intelligent (603273) had a net outflow of 143 million yuan from institutional investors [3]