"Rou" is a standard first-class word (commonly used word) in modern Chinese. It is pronounced as rà u in Mandarin, which was first seen in Oracle Bone Inscriptions in Shang Dynasty and belongs to pictograph in Liu Shu. The basic meaning of "meat" is the red soft tissue in human body or animal body, such as meat and meat; Extended meanings are edible parts of fruits, such as longan and wax gourd. In daily use, "meat" is also often used as an adjective to indicate common customs, such as meat eaters. The word "rou" was first found in Oracle Bone Inscriptions in Shang Dynasty, and later found in Chu Bamboo Slips, Qin Bamboo Slips and Essays. The simplified word "rou" evolved from Xiao Zhuan in Qin Dynasty.