Zhang Yi, a counselor, had a great plan and traveled across the six countries but encountered obstacles everywhere. After entering the Qin Dynasty, he was appreciated by King Qin Huiwen. He lobbied the princes with his sharp tongue, disintegrated the alliance, sowed the relationship between the six countries, and sought the greatest interests for the Qin State in the vertical and horizontal manipulations, becoming a famous figure in the Warring States Period.
