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Wubizhi: (武備志) Compiled by Mao Yuanyi in 1621, this is the most comprehensive military encyclopedia in Chinese history. It spans 240 volumes and covers topics ranging from battlefield tactics and weapon blueprints to coastal defense maps and divination.
The title is presented here in bold, vertical calligraphy on a white paper slip, which was pasted onto the dark blue protective outer cover to identify the work on a scholar's shelf.