One of the most important figures of Korean royal history King Sejong develop a 20-year relationship with engineer and inventor Jang Yeong-sil, a truly remarkable scientist based on their common interest in astronomy.
简介：One of the most important figures of Korean royal history King Sejong develop a 20-year relationship with engineer and inventor Jang Yeong-sil, a truly remarkable scientist based on their common interest in astronomy.
