Guan Yu was a famous general during the late Eastern Han dynasty in ancient China. He is best known for his loyalty and bravery, particularly in his service to Liu Bei, the founder of the Shu Han kingdom. Guan Yu played a significant role in the events of the Three Kingdoms period, which is a popular historical era in Chinese history. In addition to his military prowess, Guan Yu is also revered in Chinese culture as a symbol of righteousness and loyalty. He is often depicted in art and literature, including the classic novel Romance of the Three Kingdoms. Today, he is worshipped as a deity in various Chinese folk religions, representing protection and justice.