摘要
Yixing was one of the concentrated developed areas of karst caves in China, there were altogether eighty-three caves located in a land range of eighty kilometers. Some famous caves developed in the past years attracted many tourists every year, one of them belonged to world class geological relic resource, five national-level, and two other national-level geological relics. They occupied important values of scientific research, science popularization and aesthetics and were provided with the conditions of constructing national geopark.