政策論證 子產 傳統修辭模式 對話模式 縱橫捭闔 反覆周旋 言有象比 相反相成 Policy argument Tsze-chan Traditional-rhetorical argument Conversation argument To form alliances and sow dissensions by maneuvering among various political groupings Repeatedly to hand round with Have appearance and comparison to the words To be both opposite and complementary to each other