in 506, 楚 Chʽu and not Yüeh , was the great hereditary enemy of Wu . The two states, Chʽu and Wu , had been constantly at war for over half a century, 74 whereas the first war between Wu and Yüeh was waged only in 510, 75 and even then was no more than a short interlude sandwiched in the midst of the fierce struggle with Chʽu . Now Chʽu