As one of the four ancient civilizations, China has a splendid civilization of five thousand years, and has various cultural essences that have a profound impact on later generations. Today, five thousand years later, various archaeological studies have discovered that the earliest oracle bone inscriptions, the earliest knotted records, and the earliest currency, shell coins, developed and circulated until they disappeared. The earliest book studied by archeology may be "Luohe Map", but the earliest currency found may be shell coins. How did shell coins develop and circulate in the long history? There are no documentary records, because there are very few archaeological studies in the Xia, Shang and Zhou dynasties, and the fragmentary oracle bone inscriptions cannot be compiled into a book. The most are the piles of shells in the Erlitou tombs... This story is purely fictitious, and any similarity is purely coincidental.
