Group 1 - The low-altitude economy sector experienced a strong upward trend, with Zhonghua Rock Soil hitting the daily limit and leading the gains among related stocks [1] - A significant international order was signed between UAE's Autocraft and China's Shiji Technology, involving a procurement agreement worth up to $1 billion for 350 E20 eVTOL electric vertical takeoff and landing aircraft [1] - This order marks a milestone in the development of China's eVTOL industry, being the largest single eVTOL procurement order received by a Chinese company to date [1] Group 2 - Zhonghua Rock Soil is expected to report a net loss of 150 million to 190 million yuan for the first half of 2025, a reduction from a loss of 259 million yuan in the same period last year, attributed to a significant decrease in accounts receivable and reduced credit impairment losses [2] - The company has outlined its strategic focus for the next three years on engineering construction and the low-altitude economy, planning to expand into environmental projects while ensuring stable growth in traditional engineering businesses [2] - The large procurement agreement is expected to inject strong momentum into the development of China's eVTOL industry and create positive market expectations for related concept stocks, with ongoing policy support likely to provide more growth opportunities in this emerging field [2]