夜舞笙歌寂繁华
[yè wŭ shēng gē jì fán huá]
Describing dancing ('舞') under the night sky, accompanied by music played on the sheng (a type of traditional Chinese wind instrument, '笙') and songs ('歌'), amidst a scene filled with noise and luxury ('繁华'), yet ultimately feeling lonely or desolate ('寂'). Contrasting the outer exuberance and inner loneliness.