The karst of Xingwen, China, contains the Xiaoyanwan tiankeng, alongside the degraded tiankeng of Dayanwan and also the potential collapse chambers in the Zhucaojing cave system.
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- 四川兴文喀斯特包括小岩湾天坑和大岩湾退化天坑,以及猪槽井洞穴系统中潜在的洞穴崩塌大厅。