It is an upright stalactite pillar formed naturally, which seems to support the whole natural cave.
Yuzhu
This is a polysemous word. Please browse on the following items (2 meanings in total)
Yuzhu: stone pillar
Yuzhu: Professor of China Agricultural University
Address: Lingya temple, Lueyang County, Hanzhong, Shaanxi Province
Longitude: 106.159536
Latitude: 33.310877
Chinese PinYin : Yu Zhu
Yuzhu
Baise Uprising Memorial Hall. Bai Se Qi Yi Ji Nian Guan
Taiyechi site, jinzhongdu, Beijing. Bei Jing Jin Zhong Dou Tai Ye Chi Yi Zhi
Sishi ancient residential complex. Si Shi Gu Min Ju Jian Zhu Qun