Group 1 - The State Intellectual Property Office of China has published a patent application for a new aluminum alloy ingot and its preparation method, filed by three companies: China Aluminum Materials Application Research Institute Co., Ltd., Chongqing Guochuang Light Alloy Research Institute Co., Ltd., and Chongqing Dao Metallurgical Technology Co., Ltd. [1] - The patent describes an aluminum alloy ingot with specific composition percentages, including Mg 4.30%-5.20%, Mn 0.40%-0.60%, La 0.05%-0.15%, and others, which contributes to its mechanical properties and processing performance [1]. - The average grain size of the aluminum alloy ingot is specified to be ≤90μm, with intermetallic compound sizes also detailed, indicating a focus on quality and yield in the production of aluminum alloy plate materials [1]. Group 2 - China Aluminum Materials Application Research Institute Co., Ltd. was established in 2017 in Beijing, with a registered capital of 70 million RMB, and has participated in 118 bidding projects and holds 492 patents [2]. - Chongqing Guochuang Light Alloy Research Institute Co., Ltd. was founded in 2021 in Chongqing, with a registered capital of 120 million RMB, participating in 84 bidding projects and holding 66 patents [2]. - Chongqing Dao Metallurgical Technology Co., Ltd. was established in 2023 in Chongqing, with a registered capital of 10 million RMB, and has participated in 1 bidding project [2].

Group 1 - High temperatures have led to increased demand for electric coal transportation, with over 7,000 coal-laden trains departing daily from Changzhi, Shanxi to provinces like Henan, Shandong, and Hebei [2] - The railway line through the Taihang Mountains has complex terrain, resulting in a 10% increase in traffic during the summer, necessitating the replacement of over 300 brake pads daily at the Changzhi South inspection yard [4] - A typical electric coal train, consisting of 60 cars, requires a 35-minute technical inspection to ensure timely departure, with critical checks performed manually and brake performance tests conducted by an intelligent robot nicknamed "Little Crab" [6] Group 2 - In Henan, construction projects are ongoing despite the heat, with workers using special air-conditioned protective clothing to cope with high temperatures [8] - An aluminum production facility in Henan is producing 6,000 tons of aluminum alloy plates for shipment to Anhui, providing employees with heat subsidies and cooling supplies [10] - The meteorological forecast indicates that high temperatures will persist in Henan, prompting public advisories to minimize outdoor exposure during peak heat hours [12] Group 3 - Chengdu has issued a red alert for high temperatures, with ground temperatures at the airport nearing 50°C, yet ground staff continue to work to ensure safe and orderly summer flight operations [13][15] - Hundreds of flights operate daily from Chengdu Shuangliu International Airport, with maintenance of high mast lights being essential for safe operations, requiring staff to work in extreme heat [17] - The airport has established shared rest areas for frontline workers, providing a cool and comfortable environment with essential supplies and first aid items [19]