Zhang Qian went on a mission to the Western Regions and saw a bloody horse in Ershi City of Dayuan Kingdom, and reported it to Emperor Wu of the Han Dynasty when he came back. The emperor was filled with envy after hearing this. He ordered the envoy to bring a thousand catties of gold, cast a golden horse as big as a real horse, and sent it to the Kingdom of Dawan, asking for a bloody horse in exchange. The King of Dawan said: The second master Tianma is the national treasure of Dawan and cannot be given to the Han people. The Han envoy, who regarded himself as the envoy of the Heavenly Kingdom, was immediately furious. He made no appearance at the Dawan court and broke the golden horse. Seeing that the Han envoy was rude, the King of Dayuan ordered his men to kill the envoy and take away the gold and gold horses. Emperor Wu of the Han Dynasty was furious, and thus began a war to compete for Han-blooded horses.
