By the Chinese Academy of Sciences Institute of Geology experts to inspect the cave that:ci dong formed in the Cenozoic Quaternary ice age, about three million years ago, ice cave named years.

• 经中科院地质研究所洞穴专家现场考察认定：此洞形成于新生代第四纪冰川期，距今约三百万年，故名万年冰洞。