An old man in Shanghai has reproduced the Zhaozhou Bridge with 200,000 procedures and more than 7,000 fully mortise and tenon parts.

He had won a gold medal at the 2016 World Crafts Industry Expo for a miniature model of the Temple of Heaven's Prayer Hall created with full mortise and tenon techniques. Each door and window can be opened and closed freely, and all 877 parts are put together with mortise and tenon without a drop of glue. Every combination of mortise and tenon and dowel conveys the ancient culture and wisdom of China. Netizens lamented, "Even if the technology is more developed, the pure wooden structure of mortise and tenon is still full of wisdom and charm."

Have you seen the Lu Ban lock? Legend has it that during the Spring and Autumn Period, Lu Ban, an artisan from the state of Lu, in order to test his son's intelligence, used six strips of wood to make a toy that could be assembled and disassembled, and told his son to disassemble it - his son was busy all night, and finally disassembled it - this kind of toy has been known as the locks of Lu Ban - in fact, this is just a kind of legend, the locks of Lu Ban are also known as the locks of Kongming, don't be bored with the stick, the six sons of Lianfang, Monaihe, and the difficult wood, etc. - which originates in the mortise-and-tenon joinery, which is the first of its kind in the architecture in China's ancient times. /p>

Speaking of mortise and tenon construction, an old engineer made a model of the Temple of Heaven in Shanghai using mortise and tenon construction! It's a craftsman, and even more tenacious. ------ This miniature Hall of Prayer, before and after 5 years, after more than 100,000 procedures, composed of 7108 parts, the smallest part is only 2mm, complete mortise and tenon structure, without a nail, a drop of glue.

The height is 0.5m and the maximum diameter is not more than 0.8m, which is 81 times smaller than the original scale! Each part can be disassembled, in accordance with the principle of mechanics, like building a real house built. Each small door, a gentle push can be opened; three layers of heavy eaves turned up, gradually closed, exactly the same as the original shape; fingers caressing, smooth steps, doors and windows concave and convex undulation, every place full of royal texture!

Zhaozhou Bridge was built in the Sui Dynasty, is located in Zhao County, Hebei Province, Hebei Province, on the Xiao River, known as the "world's first bridge". With a history of about 1,400 years, it is the earliest and best-preserved ancient open-shoulder stone arch bridge in the world today.

As an emerging technology, 3D printing uses bondable materials to construct objects by printing layer by layer. Concrete 3D printing is a new additive manufacturing technology that stacks cementitious composites layer by layer, and is rapidly emerging in the fields of architecture, bridges, and infrastructure due to its moldless, automated, rapid, and flexible construction advantages.