Yellow Wind Ridge
Yellow Wind Ridge is the perilous place where Tang Sanzang and his disciples encounter danger in the 20th chapter of "Journey to the West." The main location here is the Yellow Wind Cave, the lair of the Yellow Wind Guai. The original text describes Yellow Wind Ridge as having steep cliffs and unusual winds frequently blowing through the mountains.
Flowing Sands Kingdom
In the original "Journey to the West," the Flowing Sands Kingdom is mentioned only briefly, specifically in the chapter involving the New Thunderclap Temple. When Sun Wukong goes to request assistance from the three armies of deities, the Grandmaster of the Great Sage sends his disciple, Little Prince Zhang, who introduces himself as the prince of Flowing Sands Kingdom. Some interpretations link the Flowing Sands River, where Sha Wujing (Sandy) resides, with the Flowing Sands Kingdom, but these connections are purely based on name similarity without substantial evidence.
Regarding the plot in "Black Myth: Wukong," where the Flowing Sands Kingdom expels Buddhists and worships rats as deities, there is a similar storyline in the original text: The Immortal of Tiger Power, the Immortal of Elk Power, and the Immortal of Antelope Power are three Yaoguai who disguise themselves as Taoist magicians to deceive the ruler of the Kingdom of Chechi. They expel Buddhists and force the populace to follow Taoism.