Introduction to the Yulin Corridor: There are 330 hectares of natural white elm forest in the valley. It is distributed in a strip along the valley, with a length of more than 10 kilometers and about 100,000 trees. The average tree age is 80 years and the average tree height is 13.5 meters. The diameter at breast height is 28.4 cm, and the average crown width is 4.6 meters. The only road leading to the scenic spot passes through the Yulin Forest, giving people the impression of a corridor, so it is called the Yulin Corridor.