Bronze caliper
According to legend, this bronze caliper was invented by Wang Mang, the emperor of the new dynasty. It consists of a fixed ruler and a movable ruler. The upper end of the fixed ruler is provided with a fish-shaped handle, and the middle of the fixed ruler is provided with a guide groove. A guide pin which can be rotated and adjusted is built in the slot, and can move left and right. It is exactly the same as the modern vernier caliper in performance, principle and usage, but it was invented thousands of years ago, so Wang Mang is called "Crossing the Emperor".
Tenon and mortise technology
Mortise and tenon technology is so common in modern times that everyone is used to it. However, it is actually a great invention in the history of ancient architecture in China. Mortise and tenon technology is mostly used in ancient buildings. The method is to construct wood blocks with different shapes and achieve the effect of splicing by dividing wood blocks. Mortise-and-tenon architecture can be very strong even without a nail, which is widely used in modern furniture manufacturing, making furniture integrated.
The tenon and mortise technology tests people's three-dimensional thinking, and wood needs high precision, which embodies the ancient people's accomplishments in geometry and sculpture, and has a high status in China and even the world history.
bronze sword
Archaeologists are surprised by the discovery of ice guides, which are similar in function to modern refrigerators and air conditioners. Ice guides are mostly made of wood or bronze. Before use, you can put ice cubes in the ice guide and then put food in it, which can play the role of refrigerator. There is a cover plate on the top of the ice guide with small holes, which can not only pick up hands, but also release cold air to cool the room and play a role similar to modern air conditioning. In the Warring States period more than two thousand years ago, such a practical invention was really amazing.
There are too many ingenious inventions in the history of China. The above three kinds have been passed down to this day, some of them have been used directly, and some have changed their materials, basically retaining the principles and ideas. Ancient people did have great wisdom.