What are the characteristics of ice caves in Wufeng County?

Any river, lake and sea located in the north of a certain latitude in the cold temperate zone will freeze in winter and turn into clear water in summer. This is the law of nature and common sense of human beings. However, there is a strange phenomenon in the world that does the opposite-the spring water freezes in the sky, and the hotter it is outside, the thicker the spring water freezes. According to the Shantou Special Zone Evening News, there is a natural ice spring in Baiyi Village scenic spot under Yuping Peak, Wufeng County, Hubei Province, at an altitude of 1700 meters. The ice spring is completely exposed on the ground. Every summer, the water in the ice cave begins to freeze. The hotter the weather, the thicker the ice layer, and the lowest temperature of the "ice cave" can reach MINUS 20 degrees. This "ice cave" is only about 2 meters higher than the hole, but it is still green.

The water in the ice cave is bright all year round, and the raw pickles used by nearby villagers are not smelly or rotten. The average life expectancy of villagers in Baiping Village and Hu Ping Village who drink this spring and its adjacent water sources is 70. 1 year, including 69 people aged 60 to 80, 20 people over 90, and 2 people over 100. There are 2 1 person who are still alive over 90 years old.