There are parallel "shadow ecosystems" on the earth. The countless rare and exotic beasts in myths are not legends, but remnants of prehistoric civilization hidden from human sight. "March 15 Wulongshan Mining Disaster". The mining team dug through the boundary wall of the earth's crust and was attacked by a group of unknown creatures, killing all members. The country immediately sealed off the site and established a secret organization - "Project 7". Human civilization officially began the exploration and containment of underground ecology.
