and his death at the early age of around 30. Liu Bang's general Han Xin, who was one of Xiang Yu's opponents on the battlefield, made a statement criticising Xiang, "A man who turns into a fierce warrior when he encounters a rival stronger than he is, but also one who is sympathetic and soft hearted when he sees someone weaker than he is. Neither was he able to make good use of capable generals nor was he able to support Emperor Yi of Chu, as he killed the emperor. Even though he had the name of a Conqueror, he had already lost the favour of the people." The Tang dynasty poet Du Mu mentioned Xiang Yu in one of his poems Ti Wujiang Ting (): "Victory or defeat is common in battle. One who can endure humiliation is a true man. There are several talents in Jiangdong, who knows if he (Xiang Yu) can make a comeback?" However, the Song dynasty poet Wang Anshi had a different opinion, as he wrote, "The warrior is already tired after so many battles. His defeat in the Central Plains is hard to reverse. Although there are talents in Jiangdong, are they willing to help him?" The Song Dynasty female poet Li Qingzhao wrote: "A hero in life, a king of ghosts after death. Until now we still remember Xiang Yu, who refused to return to Jiangdong." Xiang Yu is popularly viewed as a leader who possessed great courage but lacked wisdom, and his character is aptly summarised using the Chinese idiom you yong wu mou (), meaning "has courage but lacks tactics", "foolhardy". Xiang Yu's battle tactics were studied by later military leaders while his political blunders served as cautionary tales for later rulers. Another Chinese idiom, si mian chu ge (), was also derived from the Battle of Gaixia, and used to describe someone in a desperate situation without help. Another saying by Liu Bang, "Having a Fan Zeng but unable to use him" (), was also used to describe Xiang Yu's reliance on his advisor Fan Zeng and failure to actually listen to Fan's advice. Modern era Modern history study has draw the comparative similarities of Xiang Yu military brilliance with Hannibal, general from Carthage who are famous for his genius in military strategy, and Shaka Zulu. Like those famous military leaders, researchers emphasized Xiang Yu strategic thinking, while also