This book was published during the reign of King Taejong (r. 1400-1418) using the country’s first copper printing types made in 1403 (3rd year of King Taejong’s reign). The first copper printing types (called Gyemija) are precious materials for those studying the technology for type production and setting of the Goryeo and Joseon periods. Since Gyemija was used only for a short period, there are few remaining books printed with it. One page is missing in Volume 6 (pages 1 ~ 32). The covers have been discolored, and some letters are illegible. Still, it is in relatively good condition compared to Volumes 4 & 5. The book was printed more clearly than other books printed also with Gyemija. It is very valuable as one printed with the country’s first copper printing types.