半城烟火红尘旧梦

This online name evokes a sense of nostalgia and the impermanence of time. '半城烟火' ('Half-city Smoke') symbolizes bustling urban life or fleeting moments that once filled half the city with life and bustle. '红尘旧梦' ('Red-Dust Old Dream') alludes to memories or dreams in the world of mortals, which often have a romantic or transient feeling. Combined together, it implies a reminiscence over past glories or emotions from an era gone by.