青楼满坐只因人心寂寞
[qīng lóu măn zuò zhĭ yīn rén xīn jì mò]
'Qinglou Full Of Lonely Hearts' refers metaphorically that brothels (historical places known for hosting singers and entertainers who would also have intimate relations) being frequented by lonely men in ancient China. It reflects a commentary about loneliness and emotional emptiness leading to unhealthy behaviors.