The oracle bone script is the earliest existing characters in China. These characters carved on tortoise shells or animal bones are quite mature. Before recognizing the oracle bone script, people regarded the shells and bones as medical materials. Accidentally, a scholar of the Qing Dynasty, Wang Yirong, discovered these tortoise shells and animal bones. After careful study, he believed that these signs were the characters of the Shang Dynasty more than 3,000 years ago. From these characters, people can roughly understand the daily life of the rulers at that time. The oracle bone script provides important materials for research into the origin of Chinese characters.