China Unicom, in collaboration with its partners, has unveiled a groundbreaking achievement in large-scale model heterogeneous mixed training over the world's longest distance. This milestone represents a significant breakthrough in cross-domain collaborative scheduling and heterogeneous resource integration technology, firmly establishing the foundation for the next era of the Internet industry. Spanning an impressive 1,500 kilometers, the system has successfully demonstrated its capability to efficiently train AI large models with up to 100 billion parameters. This advancement not only propels the artificial intelligence field forward but also accelerates the trajectory towards intelligent transformation.