What did zheng he see on his voyages?

zheng he  (chinese:   鄭和; 1371–1433 or 1435) was a chinese  mariner,  explorer,  diplomat,  fleet admiral, and court eunuch during china's  early ming dynasty. he was originally born as  ma he  in a muslim family, later adopted the conferred surname zheng from emperor yongle.[2]  zheng commanded  expeditionary voyages  to southeast asia, south asia, western asia, and east africa from 1405 to 1433. his larger ships stretched 120 meters or more in length. these carried hundreds of sailors on four tiers of decks.[3]

as a favorite of the  yongle emperor, whose  usurpation  he assisted, zheng rose to the top of the  imperial hierarchy  and served as commander of the southern capital  nanjing  (the capital was later moved to beijing by the yongle emperor). these voyages were long neglected in official chinese histories but have become well known in china and abroad since the publication of  liang qichao's  biography of our homeland's great navigator, zheng he  in 1904.[4][5]  a  trilingual stele  left by the navigator was discovered on the island of  ceylon  shortly thereafter.

sadi to be the richest man ever with a net worth of 500b or half a trillion there is also a story i heard if you wanna know