It is said that 200 years ago, Japan was not as neat as it is now, and there were small tribes everywhere. At that time, a couple were working in the field, digging fields and ditches, while digging gold seals. At that time, this gold seal was engraved with "Slave of King Han Wei". Many Japanese characters are from China, and even now they look like this, although they don't admit that their culture came to China. For the same reason, when the farmer gave the golden seal to the leader, the Japanese were very upset because they knew these Chinese characters, so they called the golden seal only a forgery.
However, in 198 1, another gold seal was unearthed in Jiangsu, and it was exactly the same as that in Japan, with the same size and shape, including the same material. The key is that this gold seal belongs to the Han Dynasty. Moreover, according to the appraisal of the relevant appraisers based on the existing evidence, it is entirely possible that these two gold seals were made by the same craftsman. So this is a direct proof that Japan once surrendered to the Han Dynasty. Therefore, since the discovery and historical announcement of this golden seal spread to Japan, it reminded Japan of the golden seal once collected by its own country, which directly proved that Japan was a vassal of the Han Dynasty, thus causing great shock.
As for Japanese culture, although they don't want to admit that it was developed in China, many of their Japanese are traditional characters in China, and it's useless to deny it.