Zheng He (Chinese: Zheng He ; 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. 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.

Ma He was captured by the Ming armies at Yunnan in 1381. General Fu Youde saw Ma He on a road and approached him in order to inquire about the location of the Mongol pretender. Ma He responded defiantly by saying that the Mongol pretender had jumped into a lake. Afterwards, the general took him prisoner. He was castrated before being placed in servitude of the Prince of Yan at age 10, although another source indicates the castration occurred in 1385.  Ma was sent to serve in the household of Zhu Di, the Prince of Yan, who later became the Yongle Emperor. Zhu Di was eleven years older than Ma. Since 1380, the prince had been governing Beiping (later Beijing), which was located near the northern frontier where the hostile Mongol tribes were situated. Ma would spend his early life as a soldier on the northern frontier. He often participated in Zhu Di's military campaigns against the Mongols. On 2 March 1390, Ma accompanied the Prince when he commanded his first expedition, which was a great victory as the Mongol commander Naghachu surrendered as soon as he realized he had fallen for a deception.  Eventually, he would gain the confidence and trust of the prince. Ma was also known as "san bao" during the time of service in the household of the Prince of Yan. This name was a reference to the Three Jewels (San Bao , triratna) in Buddhism. There is also document saying his name could be San Bao  (lit. "Three Protections", also pronounced san bao). Ma received a proper education while at Beiping, which he would not have had if he had been placed in the imperial capital Nanjing, as the Hongwu Emperor did not trust eunuchs and believed that it was better to keep them illiterate. Meanwhile, the Hongwu Emperor purged and exterminated many of the original Ming leadership and gave his enfeoffed sons more military authority, especially those in the north like the Prince of Yan.

Did he have any children?
the castration occurred in 1385.