His son Yong-Le added some more items to the list: move the capital at vast expense; maintain a gigantic army; invade Vietnam unsuccessfully; put your favourite eunuch in charge of a nationalised fleet of monstrous ships with 27,000 passengers, five astrologers and a giraffe aboard, then in a fit of pique at the failure of this mission to make a profit, ban everybody else from building ships or trading abroad.
