一哭泪漫城一笑笑倾城
[yī kū lèi màn chéng yī xiào xiào qīng chéng]
'Tears Flood the City When Crying And Smiles Brighten Up the Whole City While Laughing'. Expresses extreme emotions: sorrow intense enough for tears to seemingly fill a city, and happiness dazzling enough for everyone around.