Introduction to building materials: All wooden components such as columns, beams, beams, rafters, citrons, and purlins in Baoen Temple are made of precious nanmu. From ancient times to the present, there are no insects, birds, or knots. The wonder of the spider web is called "a rare relic of the early Ming Dynasty" and "a unique masterpiece" by Chinese and foreign ancient architectural experts, which is unique in the country.