Having studied high-speed rail projects and infrastructure development, I find the idea of a three-hour rail connection between Seoul and Beijing via North Korea fascinating yet extremely challenging. One of the biggest hurdles is North Korea’s power grid, which is outdated and insufficient for supporting the huge electricity demand of high-speed trains. These trains consume roughly 9,600 kilowatts per hour, requiring a stable and powerful energy source—something North Korea can currently not guarantee. Additionally, the severe winter climate poses huge engineering challenges. The Korean peninsula experiences harsh Siberian cold snaps, dropping temperatures to as low as -30°C, which affects the rail bed’s stability. To ensure safety and smooth operations, the track settlement differences must be controlled within a millimeter. This level of precision is tough to achieve with the thermal expansion and contraction caused by permafrost that extends more than two meters deep. From my knowledge of the Qinghai-Tibet Railway, which had to overcome similar freeze-thaw cycles and engineering difficulties, the construction in this terrain requires cutting-edge materials and constant monitoring. For North Korea, lacking smart grid upgrades—its power grid suffers a loss rate of about 30%—means electricity may leak before even reaching the trains. Sending power from neighboring countries is complicated by these inefficiencies, and the grid could collapse under the sudden load. This is akin to trying to run 5G technology on a feature phone; the infrastructure must be modernized first. The political aspect adds another layer of complexity, as coordination with North Korea is essential but uncertain. All in all, while technically possible, connecting Seoul to Beijing with a bullet train through North Korea demands massive investments in infrastructure modernization, grid stabilization, and environmental engineering, coupled with delicate international cooperation. These insights demonstrate the vast differences between ambitious high-speed rail plans and the real-world infrastructural and environmental challenges on the ground in North Korea.