明成祖
2.You might say it was an open policy of a sort when Zheng He was sent on voyages to the western oceans by Emperor Cheng Zu of the Ming Dynasty. 
3.The third emperor of the Ming Dynasty, Chengzu (reigned 1403-1424) saw the advantage of combined Buddhist religious and political power in Tibet and rivalry between sects occupying different areas. So he conferred honorific titles on religious leaders in various parts of Tibet such as the "prince of Dharma," "prince" and "national master in Tantrism."
