{Li Yan}, a student of the Department of Modern History, was struck by lightning while visiting the ancient battlefields of Chu and Han. He traveled to 203 BC with his smartphone and became a soldier in Han Xin's army. He unexpectedly discovered that his mobile phone could access historical databases and record live battlefield situations. Well aware of Han Xin's tragedy, Li Yan took the risk to approach Han Xin and presented the historical record of his execution by Empress Lu, but was questioned. On the eve of the Battle of Weishui, he used his mobile phone to take pictures of Xiang Yu's grain and grass hoarding area, helping Han Xin win and gradually gain trust. Li Yan urged Han Xin to divide the world into three parts, but Han Xin insisted on his promise to Liu Bang and refused. After Liu Bang became emperor, suspicion grew, and Li Yan recorded Liu Bang's murderous words in advance as evidence.
