宣徳帝
These long-distance journeys were not followed up, as the Chinese Ming dynasty retreated in the "haijin", a policy of isolationism, having limited maritime trade. Travels were halted abruptly after the emperor's death, as the Chinese lost interest in what they termed barbarian lands, turning inward, and successor emperors felt the expeditions were harmful to the Chinese state; Hongxi Emperor ended further expeditions and Xuande Emperor suppressed much of the information about Zheng He's voyages.