Group 1 - The core viewpoint of the articles highlights the significance of Xiuyan jade carving as a cultural heritage and the efforts of Wang Yunxiu in preserving and innovating this traditional craft [1][11]. - Xiuyan jade carving is recognized as one of China's four famous jades, with its craftsmanship being listed as a national intangible cultural heritage in 2006 [1][11]. - Wang Yunxiu is a representative inheritor of Xiuyan jade carving, emphasizing the importance of design, skill, and patience in the craft [3][12]. Group 2 - The jade carving process involves multiple stages, including material selection, design, carving, and polishing, with some pieces taking years to complete [5][9]. - The technique of "Suohua" (素活) is a key feature of Xiuyan jade carving, showcasing the artist's skill and attention to detail, with specific forms like rings and chains being particularly challenging [5][7]. - Wang Yunxiu's notable work, the "Mother and Child Tower," took three years to complete and exemplifies the complexity and craftsmanship involved in jade carving [5][7]. Group 3 - Wang Yunxiu began his journey in jade carving at a young age and achieved recognition with his piece "Qinian Hall," which won a prestigious award after eight months of hard work [9][11]. - To promote the craft among younger generations, Wang has established workshops and training bases, teaching the principles and techniques of jade carving [11][12]. - The preservation of this traditional craft requires a balance between maintaining its heritage and adapting to contemporary themes, encouraging young artisans to enhance their skills and cultural understanding [12].

央视网消息：天坛位于北京中轴线的南端，历经了600多年的岁月洗礼，是我国现存规模最大的皇家祭祀建筑群。 专家介绍，如果将祈年殿三层屋顶边线相连，与鎏金宝顶中线在天空相交，夹角近三十度，而连接最上层屋顶边沿与中线，又可以构成近乎九十度的直角， 呈现完美稳定的三角形构图。祈年殿的设计既尽显建筑的和谐之美，又兼顾了实用性。 天坛公园工作人员 张华伟：在祈年殿上面，房檐是弯曲的，运用到了最速曲线。一般说两点之间直线最短，但是如果房檐设计成直的，下雨或者下雪的时 候，雨水不会以最快速度从房檐上排出去。按现在这种角度，雨水会以最快的速度从房顶上甩出去，保证木结构的建筑不会长期被水泡着，防止腐蚀。 在殿内，中央四根大柱，象征着一年四季，其外围有两圈柱子，内圈为十二根金柱，代表一年十二个月。外圈是十二根檐柱，对应一天十二个时辰，内、外 共计二十四根柱子，寓意一年有二十四个节气。 由于祈年殿采用独特的圆形结构，殿内的弯曲圈梁和弧形额枋，直曲搭配，柱、枋之上两百多个斗拱层层叠叠，承托着屋顶。古人将建筑结构与文化内涵进 行了完美融合。 在天坛的建筑群中，从北向南依次排列着皇乾殿、祈年殿、皇穹宇和圜丘，西侧建有斋宫，占地面积近三百万 ...