Opening line of Ouyang Xiu's (
欧阳修, Northern Song) 《
蝶恋花·
庭院深深深几许》:
庭院深深深几许?
杨柳堆烟,
帘幕无重数。(How deep, how deep is the courtyard? Willows piled like mist, curtains beyond counting.) A woman laments her absent lover behind layered courtyards. Li Qingzhao (
李清照) loved the line so much she wrote several poems borrowing the phrase.