Hồ dynasty
Hồ Nguyên Trừng (or Lê Trừng) was the eldest son of Hồ Quý Ly who was the founder of the Hồ dynasty, and a renowned military inventor of Việt Nam for his innovation in making cannons and warships. After the defeat of the Hồ dynasty by the army of the Ming dynasty, Hồ Nguyên Trừng was captured in Hà Tĩnh in 1407 and transferred to China. He was pardoned and granted a position of supervisor in the military industry of the Ming. He was eventually promoted to Deputy Minister of Industry in the imperial court of the Ming dynasty.