The most mysterious treasure in China's history, even now, is hard to forge. What are they?

In the eyes of many people, antiquity is a symbol of poverty and backwardness. At that time, the production and technical level were very backward. Surprisingly and incredibly, some of the things they left behind are difficult to copy even now. Most of these things were buried in the ground with their original owners, and were discovered by accident, eventually becoming treasures that shocked the world.

The first one is plain gauze clothing: it was unearthed in the No.1 tomb of Mawangdui Han Tomb in Changsha, Hunan Province, and it is a national first-class cultural relic. At that time, one or two plain gauze garments were unearthed, one weighing 48 grams and the other weighing 49 grams, both of which could not reach one or two. That 48-gram Zen garment is 1.6 meters long, with a sleeve length of 1.95 meters and a waist width of 0.48 meters. If you go out and remove the thick edges of the neckline and cuffs, the weight is only a little more than half a second. Even after more than two thousand years, it still embodies the superb textile skills at that time. That 48-gram plain gauze dress is now hidden in the Hunan Provincial Museum, but it was stolen. Now it is only a highly simulated sample.

It is said that when plain gauze clothes were unearthed, many experts were interested in this kind of Zen clothes and wanted to imitate lighter clothes. It took a lot of manpower and material resources, but the result of the finished product was beyond everyone's expectation. Even with the current technology, it weighed 80 grams when it was first made. After more than ten years' research and improvement, the final plain gauze clothing is 0.5g heavier than the unearthed cultural relics, and this imitation work is over. After all, with the current technology, it is impossible to imitate lighter plain yarn clothing.

The second piece is an eggshell black pottery cup, which was unearthed at Longshan Cultural Site in Donghai Valley, Rizhao City, Shandong Province. Although it is only an ancient wine vessel, there are not many surprises in appearance, but careful observation will reveal its magic. The surface of this wine vessel looks like bronze, but it is actually made of black clay, which is in the Neolithic Age before the Bronze Age. It is called eggshell black pottery cup because the thinnest part of this porcelain is only 0.2 ~ 0.5 mm thick, which is thinner than eggshell.

The most incredible thing is that even with the current technology, it is remarkable that the thickness of porcelain can reach 1 mm, and the thickness of 0.2 ~ 0.5 mm is basically impossible. However, such an impossible thing was made by backward craftsmen more than 4000 years ago.

The third is the mirror of seeing the sun in the Western Han Dynasty. The bronze mirror has a radius of 3.7 cm, a diameter of 7.4 cm and an overall net weight of about 50 grams. The back is decorated with Han Dynasty style patterns, which are now collected in Shanghai Museum. Compared with the ordinary bronze mirror, its mirror surface can not only illuminate people, but also show the patterns and inscriptions on the back of the mirror under the irradiation of sunlight or parallel light, and the effect is the same as that of light passing through the bronze mirror. But unfortunately, this magical mirror casting process was lost in the Song Dynasty, which also gave this mirror a mysterious color. In the following 1000 years, this mysterious phenomenon has been puzzling many scholars at all times and all over the world. They tried to uncover the mystery of ancient mirrors that have puzzled the world for thousands of years, but even today, no one can really copy the mirror with the same effect as the light mirror in the Western Han Dynasty.