Guan Yu (関羽), courtesy name Yunchang(雲長), was a Chinese military general serving under the warlord Liu Bei during the late Eastern Han dynasty of China. Traditionally, Guan Yu is portrayed as a red-faced warrior with a long beard wearing a green robe over his body armor. Guan Yu's weapon was a guan dao named Green Dragon Crescent Blade, which resembled a glaive and was said to weigh 82 catties (about 49.2 kg or 108.4674 lbs).
Along with Zhang Fei, he shared a brotherly relationship with Liu Bei and accompanied him on most of his early exploits. Guan Yu played a significant role in the events leading up to the end of the Han dynasty and the establishment of Liu Bei's state of Shu Han during the Three Kingdoms period. While he is remembered for his loyalty towards Liu Bei, he is also known for repaying Cao Cao's kindness by slaying Yan Liang, a general under Cao Cao's rival Yuan Shao, at the Battle of Boma. After Liu Bei gained control of Yi Province in 214, Guan Yu remained in Jing Province to govern and defend the area for about seven years. In 219, while he was away fighting Cao Cao's forces at the Battle of Fancheng, Liu Bei's ally Sun Quan broke the Sun–Liu alliance and sent his general Lü Meng to conquer Liu Bei's territories in Jing Province. By the time Guan Yu found out about the loss of Jing Province after his defeat at Fancheng, it was too late. He was subsequently captured in an ambush by Sun Quan's forces and executed.
Guan Yu's was deified during the Sui dynasty. His deeds and moral qualities have been given immense emphasis, making Guan Yu one of East Asia's most popular paradigms of loyalty and righteousness. He is still worshipped by many Chinese people today. In religious devotion, he is reverentially called the "Emperor Guan" (Guān Dì) or "Lord Guan" (Guān Gōng). He is a deity worshipped in Chinese folk religion, popular Confucianism, Taoism, and Buddhism, and small shrines to him are almost ubiquitous in traditional Chinese shops and restaurants.
