Wikipedia
Yishiha
Yishiha (; also Išiqa or Isiha Jurchen: ) ( fl. 1409–1451) was a Jurchen eunuch in the service of the Ming dynasty emperors who carried out several expeditions down the Songhua and Amur Rivers during the period of Ming rule of Manchuria, and is credited with the construction of the only two Ming dynasty Buddhist temples ever built on the territory of present-day Russia.