長平の戦い
During the Battle of Changping in 260 BC, he succeeded Wang He as the commander of the Qin army, and soon defeated the Zhao army commanded by the inexperienced Zhao Kuo, who himself had replaced Lian Po as acting commander. The Zhao army was split into two parts and its supply lines and retreat route cut off by Bai Qi. More than 400,000 Zhao soldiers, including the Shangdang people who surrendered after Zhao Kuo was shot dead by Qin archers, were slain (坑殺; buried alive) on the orders of Bai Qi.