视频丨上天入海、突破极限 2025大国工程实现重大跨越

Group 1 - The opening of the Xi'an to Yan'an high-speed railway marks a significant milestone, pushing China's high-speed rail operational mileage to over 50,000 kilometers, enhancing convenience for citizens and boosting industrial development [1] - The completion of the Uwei Expressway reduces travel time from Urumqi to Korla from 7 hours to 3.5 hours, facilitating the timely market entry of seasonal products like Korla pears [3] - The Guizhou Huajiang Gorge Bridge, measuring 2,890 meters in length and 625 meters above water, drastically cuts travel time from over two hours to just two minutes, showcasing engineering advancements [5] Group 2 - The "artificial sun," a superconducting tokamak nuclear fusion experimental device, achieved a world record of 100 million degrees Celsius for 1,000 seconds, indicating a major leap from basic science to engineering practice in fusion energy research [7] - The Jiangmen neutrino experiment successfully completed the infusion of 20,000 tons of liquid scintillator and is now operational, becoming the world's first large-scale, high-precision neutrino facility [8]