Sulfur
The old name of Hwangseong-ri is the head of the Rangrim mountain range. It was said that it was the longest time to return, and Kim Il Sung was renamed Hwang Seongryong. It is on the border between Yangjiang and Langrim. The Kanghwa railroad passes 3km north of the head. It was formed by the tributaries of the Jangjin River and the erosion of the tributaries of the Jangja River.