Introduction to Dinghai Shenzhen: A straight stalagmite standing on the stone curtain. The head and tail are almost the same thickness. It is very similar to Sun Wukong's "golden hoop", which was a stator used by Dayu to measure the depth of rivers and seas when he was controlling floods. This rare stalagmite seems to be the protector of Furong Cave. It has experienced thousands of years of changes and still remains intact.