物是人非曲终人散
[wù shì rén fēi qŭ zhōng rén sàn]
'Wu Shi Ren Fei Qu Zhong Ren San' encapsulates profound melancholy at unchanged objects/scenes amidst changing human elements; even the best gatherings must end. Specifically referring to the impermanence in relationships and environments, acknowledging beauty yet mourning loss, this phrase reflects poignant observations of life’s transformations over time.