Zhang Yi
DiplomacyA native of Wei, it is said that he and Su Qin learned from Guiguzi. In 328 BC, he served as the prime minister of Qin. He used "Lian Heng" to lobby other countries to serve Qin and helped Qin seize Shangjun and Hanzhong. After the death of King Huiwen, he fell out of favor and left Qin.