Sun Bin and Pang Juan were both apprentices of Guiguzi, but Sun was far more talented than Pang. When Pang became a general of the State of Wei, he was afraid that Sun would serve another state as a general, which would be a threat to himself, so he lured Sun to Wei and had Sun’s feet chopped off. Later Sun fled to the State of Qi and became the military counselor for Tian Ji. With Sun’s help, Tian won two victories over Pang, which led to Pang’s suicide.