"The Hidden Land" means that a large amount of land in the Ming dynasty (1368–1644) was "hidden" or unknown, since the land was managed by both the administrative and the military systems, and only the former was made public while the latter was being hidden due to confidentiality issues. This is one of the author’s creative findings as a result of his solid textual research and rigorous argumentation.Since the Ming state management system had a great impact on the land, the populat...