Located opposite the echo wall of Xihaimen, at an altitude of 1600 meters, between cliffs. The pine tree is divided into two branches, which protrude from the cracks in the rock wall, such as the double dragon exploring the sea. When the clouds are around, from a distance, the scales are shining and the horns are stretched, which looks like Shuanglong playing in the sea of clouds and pines, hence the name. This tree is 300 years old, 4.8 meters long, 0.9 meters in trunk circumference and 4 meters in crown width.