Group 1 - The world's first successful trial of a 35,000-ton heavy-haul train group was conducted by Guoneng Baoshen Railway Company, marking a significant technological breakthrough in heavy-haul railway development [3] - The trial demonstrated a "virtual coupling" system that allows multiple heavy freight trains to maintain a safe distance without physical connections, utilizing precise wireless signal transmission for dynamic grouping [3] - This successful trial has major strategic implications for the efficient and low-cost transportation of bulk goods such as coal and ore, and provides a replicable "Chinese technology solution" for global heavy-haul railway development [3]