The Military Museum is located in the Alpha District, where it was originally a naval gun factory. The exhibits in the museum highlight the evolution of Portuguese weapons. From the Middle Ages to the modern times. It can be seen from this that the process of the invention and improvement of Portuguese firearms should be influenced by the design principles of the original firearms in Ming Dynasty of China. Unfortunately, the treasure we invented was thrown away as a magic trick, which was carried forward by others and in turn restricted China with strong guns.