The three mysteries of ancient Shu, why didn't any words circulate in the civilization three thousand years ago?

First of all, the witness of ancient Shu civilization refers to the excavated cultural relics in Chengdu Jinsha Site. About three thousand years ago. The three mysteries of the ancient Shu kingdom refer to: why did the ancient Shu kingdom with a high degree of civilization last for three thousand years? Liangzhu, Sanxingdui and Jinsha sites in Chengdu, what is the relationship between them? Why didn't you find any written records about this civilization?

At the Jinsha site in Chengdu, a large number of precious gold and jade articles were unearthed there. These unearthed cultural relics can show that the craftsmanship at that time was very exquisite. However, in such an advanced civilization, archaeologists still have not found written proof, and many people speculate that the society at that time did not enter the written society. In fact, unearthed cultural relics have words, but they are not the words we use now. It's a way of writing that we haven't mastered yet.

Before Oracle Bone Inscriptions in Yin Ruins was unearthed, everyone thought that there were no words in Shang and Zhou Dynasties, only cultural relics. However, after the excavation of Yin Ruins, archaeologists found a large number of tortoise shells and animal bones with carvings. According to speculation at that time, in the late Shang Dynasty, people recorded divination-related words on divination materials (tortoise shells and animal bones). Only then did I know that the Shang and Zhou dynasties used very mature words. Maybe? Bashu symbol? They wrote it at that time, and we don't know.

However, no characters or hieroglyphs have been excavated from Jinsha Site, but this does not mean that there were no characters at that time. After all, archaeologists are only excavating a small part now, and a large part is in the state of being excavated. In addition, the carving of characters is also uncertain. Just because they were carved on animal bones in the Shang and Zhou Dynasties, it doesn't mean that the ancient Shu kingdom will also be carved on similar objects. The current technology has not found relevant written records, which does not mean that the words at that time have not been handed down.