In the 8th century AD, after the Anshi Rebellion in the Tang Dynasty, Tubo took the opportunity to capture the Hexi Corridor and cut off the Silk Road. It is rumored that a Yangzhou craftsman who followed Master Jianzhen to the east left behind a mysterious "Twelve Hours Compass", which was engraved with code words that only he and Jianzhen understood, pointing to a treasure that could change the pattern of Central Asia. The Han Dynasty carefully crafted the fragments of the Unexpected Scenery Chronicles drawn while lurking in the thirty-six kingdoms of the Western Regions, which detailed the secret route through the Pamir Plateau, avoiding the forces of the Tibetan and Arab empires, as well as a treasure of the Kushan Empire buried in the yellow sand.
