Yuehuan Sanqing

In 2147, the human deep space exploration orbiter discovered the ancient impact crater numbered LC-73 on the far side of the moon. There is a plasma gravitational dome left by an unknown civilization in the pit. Inside, there is a cluster of silicate-magnesium moonstone peaks that imitate the landform of Sanqing Mountain. Blue superconducting energy called "lunar veins" flows through the cracks in the rock. Humans have named this place "Three Clear Rings" and classified it as the highest level deep space restricted area. Any unauthorized entry into the dome is a felony. The dome force field is extremely unstable, and there is a risk of complete collapse if forced intervention.