I apologize for any confusion, but it appears there might be a misunderstanding regarding Sun Moon Lake in Taiwan, Yuchi Township. Sun Moon Lake is actually a freshwater lake located in the mountains of Nantou County, Taiwan, and not a beach. Therefore, it does not have beach-specific features such as sand color, beach length, or traditional beach amenities such as lifeguards and bathroom access related to seaside beaches. However, I'll provide a modified description based on the lake's characteristics and the provided structure.