There are 4 Dunggu trees in Younggok 1-gu. That Dunggu trees are called as "Sangdari" since the shape of Dunggu trees' location is as like 4 legs of table. Seeing these shape , people thought it was lucky omen and rich men were gathered in this village.
But 2 Dunggu trees were broken by thunder. Since then, rich men were getting lose their money and finally lost everything. So, dwellers replace the broken Donggu trees with pinko trees.
In these day, dwellers pray their health and well-being toward the oldest and biggest Dunggu tree on the 15th of the first month. Especially, dwellers came together in the town hall and share food to strengthen their ties.