In the eyes of modern people, these two technologies could not have been completed at that time anyway. Western countries want to apply for patents after developing chromium plating technology and lost wax casting technology. It turned out that China had this technology more than 2,000 years ago, and it became a joke for a while!
When Gou Jian's sword, the world's first sword, was unearthed, it did not rust for thousands of years because it was plated with a layer of chromium-containing metal. Although this sword has gone through thousands of years, it is still extremely sharp and intact. This is really a rare miracle in the world. At first, I thought it was just an example and didn't regard it as technology.
But a lot of stainless steel was unearthed in the terracotta warriors and horses of Qin Shihuang, and people didn't know until they saw a bronze ware. As early as the Spring and Autumn Period and the Warring States Period, our people had mastered a chromium oxide coating technology, which was quite mature at that time! Modern people have mastered this technology again-electronic chromium plating has been in the 20th century! How people chrome-plated bronze swords at that time has always been an unsolved mystery!
The lost wax bronze casting technology has been recorded in the history books of our country, but this technology has not disappeared in the long river of history with the decline of bronzes, but has become more and more exquisite in the hands of generations of craftsmen! Last year's hit "National Treasure" once introduced us to the treasure of the town hall of Henan Provincial Museum-moire bronze ban. This is a representative object cast by lost wax method, the earliest object cast by lost wax method in China, and one of the first 64 national treasures that can't go abroad.
A few years ago, European and American countries invented a metal casting process, which was later found to be similar to the lost wax casting process handed down from China! European and American countries once wanted to apply for a patent for this process, but later they had to give it up!
In addition to bronzes, the ancient wooden structure construction technology is incomparable to modern people. The Tang and Song Dynasties were the pinnacle of China's wooden architecture. In the Tang and Song Dynasties, the exquisite bucket arches with both mechanical characteristics and exquisite appearance were developed and improved at this time! After the Tang and Song Dynasties, the number of big trees gradually decreased, and the development of big trees was greatly affected.
By the Ming and Qing Dynasties, the bucket arch had lost its original mechanical characteristics and became an ornament of architectural aesthetics! Modern people don't know much about bucket arches, and even fewer people can master the construction technology of large wooden structures skillfully!