The origin of eunuchs can not be accurately determined, but it is said that they were created by a beautiful and virtuous princess in Assyria, while in the East, they began in the period of the formation of the ancient monarchy, roughly around the eighth century BC. Herodotus, known as the father of history, once said that this custom existed in Persia in the 6th century BC. Persians think eunuchs are more trustworthy than ordinary people and praise their loyalty. Due to the widespread use and huge demand of eunuchs, the ancient Greeks tricked or forced some handsome boys and teenagers to castrate them and sell them. According to Herodotus, the Greeks sold eunuchs to Persians at a high price in Chaath, the ancient capital of Asia Minor, which is the capital of Naples and Lydia in the Bible, so Sharudes is famous for producing eunuchs. Eunuchs were widely used in slave society and feudal society in China. According to Oracle Bone Inscriptions's research, there were eunuchs in the Shang Dynasty in ancient China.