In 1403, the new emperor, Zhu Di, ordered the construction of the Treasure Fleet- a fleet of trading ships, warships and support vessels that would travel across the South China Sea and the Indian Ocean. Zheng, He took seven voyages as commander of the Treasure Fleet. The First Voyage set sail for Calicut to purchase spices such aas cardamom, cinnamon, ginger, and pepper. The Second Voyage traveled again to Calicut. The Third Voyage, sailed from China towards the Hormuz on the Persian Gulf, passing Champa and Sumatra. In Champa, they traded with the native populations for ebony, lakawood, and aloewood in exchange for Chinese Silk and porcelain. The Fourth Voyage ordered the largest Treasure Fleet expedition yet assembled. The fleet traveled to Hormuz, where they obtained sapphires, rubies, coral beads, amber and beautiful carpets. On the Fifth Voyage, the emperor ordered Zheng he to return the envoys back to their home countries. The Sixth Voyage was Zheng He's shortest voyage. Finally the Seventh Voyage was Zheng He's last mission, which was to explore the distant lands beyond the seas and beyond the realm of the emperor.