A group of the world's earliest movable type-printed matters have been discovered by Chinese historians recently in Heishuicheng documents collected by Russia and the artifacts unearthed in Ningxia Hui Autonomous Region and Gansu Province.

This discovery convincingly proves that topography is originated in China. This batch of movable type-printed matters in the Western Xia language are mostly Buddhist Scriptures. Pictured here is the only earliest secular document, titled "Dexingji", or a (Collection of Moral Integrity), which was used in formal enlightenment by education.