From Wang Wan's (
王湾) Tang poem 《
次北固山下》 (Mooring at the Foot of Beigu Mountain). Couplet:
潮平两岸阔,
风正一帆悬 — 'The tide runs level and the two banks widen; the wind blows true, the single sail hangs poised.' Written on a journey down the Yangtze. Praised by the Tang prime minister Zhang Yue (
张说) who supposedly wrote it out himself and hung it in the chancellery as a model couplet.