Due to the age, many stories have experienced various kinds of "adding oil and vinegar" when they have been handed down, and ancient people like to exaggerate their words to show their own skills, or increase the amazing degree of the story, but in the ancient times when the cultural recognition level was not high, such things were not only common, but also often convinced by everyone. Therefore, many stories have changed their flavor in modern times.
For example, the ancient famous general Guan Yu has many records of him that people feel a little unbelievable, including his saber, the Green Dragon Crescent Knife!
According to records, the Green Dragon Crescent Moon Knife is one of the Moon Blades. According to documentary records and excavated cultural relics, the Crescent Moon Knife began to appear in the Song Dynasty, and due to weight, it was mainly used to practice arm strength, rather than a weapon in actual combat.

"Yanyue Knife" was developed from the "Chopping Horse Sword", popular in the Northern Song Dynasty, it is mainly on the sides of the large knife with two pieces of metal discs, so the name "Yanyue Knife". One is to increase the weight of the knife, and the other is to increase the protection of the knife body.
And Guan Yu's self-esteem is incomparable, he really carries an amazing weight of the Moon Blade, and is also invincible, and the Green Dragon Moon Knife that he is equipped with is said to weigh eighty-two pounds, such a weight, for many people who have not undergone long-term fitness, it is quite difficult to pick it up, not to mention the easy dance, and it is used in the battlefield where the difference will be fatal. However, Guan Yu was able to do it, so it was inevitable that people would have doubts.
However, because Guan Yu was very strong, there were quite a few people who believed that he could hold such a heavy sword. However, an ancient tomb in Guizhou unearthed a crescent moon knife, but Guan Yu's image was greatly affected. What's going on?
Originally, in the 1980s, a large number of cultural relics were excavated in an ancient tomb in Guizhou, and according to research, its burial period was probably in the Yongzheng period, and the tomb owner's surname Wu was found. In addition, there are many words about the "Great Zhou" Wu clan in the tomb, the "Great Zhou" dynasty, which was the time of the San Fan Rebellion during the Kangxi Dynasty, that is, the dynasty established by Wu Sangui as emperor. Moreover, a crescent moon knife was unearthed in the ancient tomb, which was also engraved with the character of Wu Sangui, so it is basically certain that this ancient tomb is the tomb of Wu Sangui's descendants, and this big knife is Wu Sangui's knife at that time.
In this regard, some people may wonder, this is Wu Sangui's Yanyue knife, not Guan Yu's, why guan Yu's image is damaged?
It turned out that this was because of the weight of Wu Sangui's knife. According to records, Wu Sangui's Yanyue knife did not weigh as much as Guan Yu's eighty-two kilograms, but it was also fifty kilograms, while the unearthed knife was only twenty-four kilograms! This made those who doubted that the ancients could not fight with dozens of pounds of weapons come out to discuss again.
So, is Wu Sangui deceiving people, or is the historical record wrong? In fact, this is because the weight is not converted, because it is not understood that the previous weight scale is different from the modern one.
Let's say that everyone is familiar with the idiom of "half a pound eight two", this is because in ancient times, a pound is sixteen two, which is different from the modern one pound and ten two, and one pound is multiple in various dynasties and often changes, so the weight of some weapons, in fact, is only because of the different weight of a pound, which will lead modern people to think that the ancient soldiers are personally tall and powerful.
And Wu Sangui's thing is to let Guan Yu "lie down the gun", so people also want to know, how many pounds are the eighty-two pounds of Guan Yu's Green Dragon Crescent Knife converted into a modern pound of 500 grams?
According to the records, one kilogram at that time was only equivalent to 222.72 grams today, and if you extrapolate from this, the eighty-two pounds of the Green Dragon Crescent Knife were also combined to thirty-six kilograms today.
According to historians, one pound in the Han Dynasty was equivalent to about 300 grams, but I don't know what the source is, and if you believe in this conversion ratio, then eighty pounds is equal to about forty-eight pounds.
In fact, no matter which conversion method, the final result is far less amazing than eighty-two pounds, but whether it is thirty-six pounds or forty-eight pounds, it is very remarkable to be able to use it freely on the battlefield, but the world's view of Guan Yu that is close to God is probably greatly discounted.
And this is actually not to blame the conversion is different, but also the ancient people were too easy to believe those impossible things.
At that time, the story said that Guan Yu's knife was not very smooth in the process of refining the sword, when the last fire was refined, the sky was already dark, a round of Haoyue was empty, and suddenly the fire burst out of the snow bright millimeter, shooting straight into the sky, and the teacher Fu shouted: "Quickly avoid the knife to explode!" "At this time, a green dragon passed by in the sky and was hit by a ray of light. Mi guang decapitated the green dragon and immediately retreated into the sword, and the dragon's blood stained the blade. The knife didn't explode—and the Green Dragon Moon Knife was refined.
What do you think about that?