From Greece to China, with kouros: the Terracotta Warriors in Xi’an may have found their footing through Greek artisans who migrated to China, a hypothesis supported by genetic research. From the article:

A separate study shows European-specific mitochondrial DNA has been found at sites in China’s western-most Xinjiang Province, suggesting that Westerners may have settled, lived and died there before and during the time of the First Emperor.