In November 2023, I stumbled upon an article about a virtually unknown ancient site that captured my imagination - a place that seemed to defy explanation with what appeared to be a floating door on a flat-topped mountain. This enigmatic site, located in Hejin City, Shanxi Province, China, sparked a viral sensation with its blend of natural and man-made mysteries. Despite its sudden fame, the fortress vanished from the limelight as quickly as it appeared, leaving many questions unanswered.

Determined to uncover the secrets of this ancient fortress, I embarked on a meticulous quest to learn more about this elusive site. My initial research led me to various names like ‘Longmen Fortress’ and ‘Wiezhaung Village Castle,’ with some even dubbing it a ‘Nephilim Hideout.’ However, none seemed officially recognized, prompting me to name it the Hejin City Fortress.