Before he was known as a humble monk and a protector of the Tang Priest, Sha Wujing held a position of immense prestige and power in the Jade Emperor’s Celestial Court. He was known as the Juanlian Jiangjun, or the Curtain-Raising General. His duty was one of high trust; he stood near the imperial throne, responsible for the movement of the heavy, ornate curtains that shielded the Jade Emperor from the direct gaze of the lesser immortals. He was a figure of imposing stature, dressed in shimmering golden armor, his countenance stern and his loyalty unquestioned. However, in the celestial bureaucracy, even the smallest mistake can lead to a catastrophic fall from grace. This fall occurred during the magnificent Peach Banquet, a grand celebration held by the Queen Mother of the West to honor the ripening of the immortal peaches. The air was thick with the scent of celestial blossoms and the sounds of ethereal music played on jade flutes. The most powerful deities, sages, and spirits had gathered to partake in the feast of dragon liver, phoenix marrow, and the wine of immortality.
In the midst of this opulence, an accident occurred that would change the course of Sha Wujing's existence forever. While performing his duties, his hand slipped—some say due to a moment of distraction, others suggest it was a momentary tremor of the soul—and he knocked over a crystal cup. This was no ordinary vessel; it was a treasure of the heavens, carved from a single piece of solidified moonlight and imbued with the essence of the stars. As it struck the floor of the Hall of Miraculous Mist, the cup did not merely break; it shattered into a thousand shards of light, each fragment letting out a mournful chime. The music stopped instantly. The laughter of the gods died in their throats. The Jade Emperor, whose dignity was tied to the perfection of his court, viewed this as a personal affront and a sign of ultimate disrespect. Despite Sha Wujing’s years of faithful service, the Emperor's judgment was swift and harsh. He ordered the general to be stripped of his rank and his armor, and to be punished with eight hundred lashes of a heavy iron rod. The beating was so severe that it would have killed a lesser being, but for an immortal, it was merely the beginning of a long journey of pain. After the lashes, he was cast out of the gates of heaven and plummeted into the mortal world, specifically into the desolate and terrifying Liusha River.
The Liusha River, or the River of Flowing Sands, was not a body of water in the traditional sense. Located in the heart of the region we now know as the Taklamakan Desert, it was a supernatural phenomenon where the sands moved with the fluid, drowning weight of a deep ocean. The current was made of grinding silt and shifting dunes that could swallow a man or a beast in an instant. It was said that the river was so thin and the sands so treacherous that not even a bird's feather could float upon its surface; everything that touched the river sank to the dark, crushing bottom. It was here that Sha Wujing was forced to reside. The environment was a mirror of his internal state: dry, desolate, and unforgiving. But the banishment and the location were not the full extent of his punishment. The Jade Emperor had placed a curse upon him to ensure that he never forgot his transgression. Every seven days, the sky above the Flowing Sands River would darken, and a volley of flying swords would descend from the heavens. These were not physical weapons but manifestations of celestial law, sharp as reality and hot as the sun. They would seek out Sha Wujing regardless of where he hid within the sand-currents. Each sword would pierce his chest, tearing through his spiritual essence and his physical form. The pain was described as a thousand fires ignited within the marrow of his bones. After the swords finished their work and vanished back into the clouds, his body would slowly knit itself back together, only for the cycle of agony to repeat exactly one week later.