At one point he was told repeatedly by his spies that one of his generals, Zhangzi, had surrendered to the enemy, Qin.
Sun Bin had been punished with mutilation of his knees in Wei at the instigation of his enemy Pang Juan.
As Sun Bin could not sit on a horse, he refused when King Wei offered him the actual command of the army.
Sun Bin was influential in devising the strategy for the Qi triumph at the Battle of Maling in 342 BC, which considerably weakened the rival state of Wei.
"[2] King Wei was the caster of the ritual bronze vessel bearing the earliest attestation of the Yellow Emperor, the Chen Hou Yinqi dui (陳侯因齊敦).