it was during the ming dynasty that china sent fleets of large treasure ships to the rest of the known world, short of europe. how could you blame the ming? the blame should rest squarely on court officials including finance minister who connived and convinced the retarded successor hongxi emperor (after the yongle emperor) to stop all voyages, garrison all existing ships in nanjing, and destroy almost all records including blueprints and plans for shipbuilding. during yongle reign, court officials were already against shipbuilding and voyages. the emperor refused to listen to these bozos advice and instead commanded the eunuchs and military to supervise shipbuilding. ruins and remains of giant docks where those ships were built can still be traced in zhejiang, jiangxi, huguang, nanjing, suzhou. shipbuilding was not done in fuckin alone.
the Ming dynasty had more important and pressing issues like the barbarians from outside the pass were still a significant military threat therefore they chose to divert whatever available troops, money and resources to defend against the barbarians. those ships building and voyages which required lots of money, manpower and resources have to be ended. later the Ming's sea ban was to contend against the Japanese pirates whom were seriously threatening the peoples' safety and livelihood in the coastal provinces. anyway the rest of the world was just inferior barbarians to the mighty Ming dynasty therefore they probably lost interest in those sea voyage explorations as time passed.