Su Dai 蘇代 was an older brother of Su Qin 蘇秦. He advised the king of Yan 燕 and suggested creating an alliance with Chu 楚 and Wei 魏 to withstand the growing power of the states Qin 秦 and Qi 齊. The alliance was made, and in a joint attack the state of Qi was brought to the brinks of destruction