Group 1 - The article discusses the preparations and responsibilities of the power supply company in ensuring reliable electricity during the festive season, highlighting the importance of underground cable inspections [19][20] - The company has over 2500 kilometers of underground power cables in Chengdu, with inspections conducted every three months, requiring personnel to walk several kilometers daily in challenging conditions [19][20] - Advanced technology, such as high-voltage cable monitoring devices and various sensors, has been implemented to enhance the efficiency and accuracy of inspections, shifting from reactive to proactive maintenance [20] Group 2 - The underground space at Tianfu Square houses a significant 220 kV substation that supplies power to busy commercial areas, emphasizing the critical role of infrastructure in supporting urban festivities [19] - The article illustrates the teamwork and coordination among inspection personnel, showcasing their commitment to safety and operational efficiency during the busy holiday period [19][20] - The use of smart monitoring devices allows for continuous data collection, improving the detection of potential hazards and ensuring the reliability of the power supply [20]