烟花绽放过后只剩黑暗彩虹绚烂过后只剩空白
[yān huā zhàn fàng guò hòu zhĭ shèng hēi àn căi hóng xuàn làn guò hòu zhĭ shèng kōng bái]
This name metaphorically describes how after fireworks illuminate the night, there's only darkness; after the beautiful rainbow, everything returns to nothingness. This reflects fleeting joy and beauty contrasted with subsequent emptiness.