Located in the northeastern Taklimakan Desert in China, Loulan is the stronghold which divided the Silk Road into the Southern Road of Western Regions and the Southern Road of Tianshan Mountains. It is also an oasis country prospered by trade. Loulan collapsed during the 4th and 5th centuries and disappeared in the course of history. In 1900, the explorer Sven Hedin discovered the relics of Loulan, which was confirmed to be large-scale relics by Marc Aurel Stein's excavation. So do camels, known as boats in the desert, which cross the oasis cities in the desert.