In April in the human world, the spring wind is still cold, the first night it rains again, there is still water on the curved dome, the wind just blows the drops of water, and the eaves fall into the collar. Inside the communal house at Dong Cung, two figures, one purple and one red, sat on a cold stone bench, in the breeze, fighting the humidity together. The red sleeve of his shirt flew up in the wind, the four princes held a glass of jade wine and gently placed it on the table, stared at each other for a long time, before opening his mouth to say, "What are you thinking about?" The man was suddenly startled, turned his head slightly, smiled bitterly, and said in a cold voice, "It's just a trifle."