Volume 41 of Notes on the Collection of Leftovers records that someone came to Wanqu by a spiral boat. The ship looks like a snail, sinking into the bottom of the sea, but the water is not immersed. On the boat? . Its people are ten feet long and cover their shapes with the hair of birds and animals. When the first emperor spoke to him and opened the shirt of heaven and earth, he saw it with his own eyes; . They also have amazing high-efficiency energy. If they are used for night lighting, they only need to look like millet. One can shine together; . If thrown into a stream, boiling foam will flow for dozens of miles; . These wanqu people; who is it? Qin Shihuang thought: this god man is also; . So, is there really a man of God between heaven and earth? Throughout the ages, many scholars are puzzled by this record.
And March 1994, 1, the eighth wonder of the world; The excavation of the second pit of the Terracotta Warriors and Horses of Qin Shihuang officially began. Many bronze swords, 86 cm long, were found in the No.2 pit. There are eight inspection surfaces on the sword body. Archaeologists measured with vernier calipers and found that the errors of these eight sides were less than a hair. There are 19 bronze swords unearthed.
These bronze swords are compact in internal structure, smooth in body, fine in grinding grain and seamless in texture. They have been sleeping in loess for more than 2000 years, and they are still as bright as new and extremely sharp when unearthed. Moreover, all swords are plated with a chromium salt compound with a thickness of 10 micron.