徐凝
唐
Xu Ning was a Tang dynasty poet from Fenshui in Muzhou, active around the Middle to Late Tang period. He did not become prominent in official life, but he gained literary recognition and exchanged poems with figures such as Bai Juyi. His poetry often treats landscapes, famous sites, palace emotions, and local atmosphere, with a style that is polished and visually vivid. "Remembering Yangzhou" is his best-known work, especially the couplet "If all the moonlit nights under heaven were divided into three parts, two would belong to Yangzhou."