Fan Wushou (Black) and Xie Bia'an (White) stand side by side, with a dimly lit dense forest in the background. Moonlight filters through the gaps between the leaves, casting patchy light and shadows, creating a mysterious and eerie atmosphere. Fan Wushou is dressed in a long black robe, adorned with dark golden mystical symbols, exuding a dignified and majestic aura. His face is stern, with a coldness in his eyes that exudes an air of authority without a hint of anger. His gaze is deep, as if able to pierce the soul. His hair is tied in a crown, with a few strands of hair hanging over his forehead, adding to his stern demeanor. His hands are behind his back, and behind him, there are wisps of black ethereal energy, as if connected to the underworld. Behind him, there is an ancient gravestone visible, inscribed with blurred inscriptions, adding to the sense of mystery. Xie Bia'an, on the other hand, is dressed in a white robe, also adorned with golden symbols, forming a stark contrast with Fan Wushou's black robe. His face is handsome, with a gentle smile in his eyes, yet his gaze is sharp and cunning. His hair is casually draped, giving off a sense of nonconformity and elegance. He holds a white paper fan, with a few red red spider lilies painted on it, making it particularly striking. Behind him, there are a few wisps of white smoke, as if the unique aura of the messengers of the underworld, both mysterious and carrying a touch of eerie beauty. Standing together, one black and one white, one cold and one warm, they seem like the twin sons of the underworld, guarding the order of the netherworld. In the surrounding dense forest, occasional calls of the night owl add to the quiet and mysterious ambiance.