爱群大厦自1937年落成后即成为广州的著名地标，并保持了“广州第一高楼”的地位近30年，被誉为“南中国之冠”。
爱群大厦是典型的“装饰艺术”（Art Deco）风格建筑。Art Deco流行于1920～1930年代的美术、建筑、室内设计领域，表现了奢华、繁荣的风尚以及对技术进步的崇拜，与当时广州的社会气象不谋而合。
Art Deco建筑具有强烈的风格特征，其中之一是大量运用夸张的几何构图。比如放射状的旭日图案，象征20世纪初的时代曙光；模仿机械结构的几何图案，象征工业文明的蓬勃。爱群大厦的竖向长窗上下对齐，窗顶部削角成梯形，营造了笔直提拔的观感。整个建筑立面造型强调垂直线条，表现出强烈的向上动感。
爱群大厦在建造时，使用了德国西门子钢材建造的巨型钢骨架，以及考究的内部装修材料与设计，都体现了Art Deco“工艺精致，材料稀有而贵重”的特征。大厦屋顶的金字塔形塔楼又体现了Art Deco的另一特点：大胆吸收异域或古代文明元素，将其运用于现代建筑设计中。
此外，Art Deco通常选用鲜明、饱和而对比强烈的色彩。从HSB色彩模型来看，Art Deco的配色方案通常采用高饱和度（S > 70%）、中高亮度（B ≈ 50–90%）的主色调，与低饱和度、亮度极高或极低的底色形成强烈对比。由此形成的戏剧性、奢华感与高对比度色调，呼应了该风格的几何美学与华丽特质。
如何找到宝藏：
这个宝藏位于爱群大厦外围，距离大厦外墙30米的范围内。容器放在某个物体里面，这个物体的颜色是下图颜色的“对比色”——色相（H）相反，饱和度（S）与亮度（B）相同。
请您到现场找到该物体，即可发现藏在那里的容器。
Since its completion in 1937, the Oi Kwan Hotel has stood as a renowned landmark in Guangzhou, holding the title of the city's tallest building for nearly three decades. Revered as the "Crown of South China," it has left an indelible mark on the cityscape.
Designed in the Art Deco style, the Oi Kwan Hotel embodies the ethos of the era. Art Deco, characterized by its fusion of modern aesthetics with meticulous craftsmanship and opulent materials, epitomized luxury, glamour, and progress during its zenith in the 1920s and 1930s. This architectural trend resonated deeply with the social milieu of Guangzhou at the time.
Art Deco colour schemes in HSB terms typically feature high saturation jewel tones (S > 70%) with medium–high brightness (B ≈ 50–90%), contrasted against low-saturation neutrals or metallics with very high or very low brightness. The result is a dramatic, luxurious, and high-contrast palette that perfectly complements the style's geometry and glamour.
The cache is hidden within 20 meters of the Oi Kwan Hotel's façade. The container is placed within an object whose colour is complementary to the hue depicted in the provided image.
Complementary colours, as delineated in the HSB model, are positioned opposite each other on any horizontal cross-section of the colour wheel. Utilizing the HSB colour wheel, you can discern the complementary colour and locate the object adjacent to the building, wherein the cache is hidden.
