Mang Mao 芒卯, also called Meng Qing 孟卿, came from Qi 齊 and was counsellor-in-chief of Wei 魏. When the states of Qin 秦 and Zhao 趙 made an alliance to attack Wei, Mang Mao offered the territory of Ye 鄴 to Zhao. Zhao thereupon dissolved the alliance with Qin, and, fearing that Wei had now created an alliance with Qin, dared not to occupy Ye. Zhao furthermore offered to cede some territory to Wei with the offer to create an alliance against Qin.