Literature Reference: 山鸟宿簷树，水萤流洞门。—— 《和刘补阙秋园寓兴六首 六》 雍陶 Mountain birds nest in the eaves' trees, while water fireflies drift by the cave's entrance. Source from 'Six Poems on Dwelling in the Autumn Garden, in Response to Liu Buque' by Yong Tao.
水: Rivers, streams, lakes, and seas collectively. It metaphorically signifies that when conditions are ripe, tasks will be accomplished smoothly.
萤: [Fluorite] A mineral with a vitreous luster, often capable of changing color when exposed to light or heat, also known as "fluorspar."
Meaning: Water fireflies symbolize the liveliness and purity of nature, like fireflies in the water, light and shimmering, representing the vitality and hope of life.