逆夏流年夕夏温存
[nì xià liú nián xī xià wēn cún]
Ni xia liunian xi xia wencun is poetically constructed, meaning something akin to 'reversing the flow of time during summer nights preserves memories warmly'. A username like this may allude to holding onto beautiful but fleeting memories, especially of summers past, and the nostalgia tied to such moments of warmth and light.