Group 1 - Chengdu has issued its first high-temperature orange warning signal for 2025, marking the official start of the high-temperature period [1] - China Railway Construction has implemented effective measures to ensure construction safety and progress during extreme heat, including adjusting work shifts and prohibiting work when temperatures exceed 38°C [1][2] - The construction site is equipped with clean drinking water and cooling beverages, along with medical supplies to ensure the health of workers [1] Group 2 - Significant progress has been made in Chengdu's rail construction, including the successful electrification and transfer of the Chengdu Metro Line 13 Phase I, and the completion of major structures at various stations [2] - The labor unions at China Railway Construction will continue to enhance heat prevention measures and provide support to frontline workers to ensure their health and safety while advancing project construction [2]