Early Ming Dynasty historical drama. After King Yan ascended the throne, in order to promote the country's prestige and communicate with overseas countries, he appointed trusted eunuchs to form a fleet for long voyages. The protagonist is both wise and courageous, calm and courageous. He led a huge fleet to the Western Ocean seven times. He went through dangerous waves, foreign relations and pirate chaos, and traveled all over Southeast Asia and the Indian Ocean coast. The fleet spread civilization, carried out trade, maintained good neighborliness and friendship, and created ancient navigation feats. The play shows the feats of navigation, court strategies, and feelings about family and country, and writes an open, inclusive, and powerful maritime legend in the prosperous times.