In the early 15th century, the Yongle Emperor (Zhu Di, r. 1402–1424) of the Ming Dynasty launched the most ambitious maritime expeditions in pre-modern history—commanded by the Muslim eunuch admiral Zheng He.
Foreign rulers sent envoys bearing "tribute" (local products) to the Chinese court. In return, they received imperial recognition, trade privileges, and lavish gifts (often far exceeding the tribute's value). It was a hierarchical diplomatic order with China at the center—the "Middle Kingdom."
After Yongle's death, Confucian officials opposed the cost (~1% of state revenue annually) and "barbarian" engagement. The fleet was dismantled; records destroyed. China turned inward—just as European exploration began.
Zheng He's voyages remain a staggering feat of logistics, navigation, and statecraft—unmatched until the 20th century.