Han Xin
Xiang Yu sent Long Ju to lead 200,000 troops to help Tian Guang. Long Ju and Tian Guang lost to Han Xin in the first battle. Someone advised Long Ju to avoid engaging Han Xin directly and focus on strengthening their defences, while asking Tian Guang to rally support from the fallen Qi cities. In that case, Han Xin's army would eventually be deprived of supplies and be forced to surrender. However, Long Ju rejected the plan and insisted on attacking Han Xin. On the night before the battle, Han Xin sent his men to dam the Wei River (濰水; in present-day Weifang, Shandong) with sandbags.