During the ming dynasty of china what areas did chinese sailers travel to

During the Ming Dynasty chinese sailors traveled through a 7 ocean expedition. 
"Southeast Asia and then on to India, all the way to major trading sites on India's southwest coast. In his fourth voyage, he traveled to the Persian Gulf. But for the three last voyages, Zheng went even further, all the way to the east coast of Africa" -columbia university website

The led the formation to the united states