Mysterious Ancient Door that nobody can explain

Situated atop a lofty loess slope, this mysterious ancient fortress is cleverly concealed by deep gorges, rendering it almost invisible to the untrained eye. Even local residents have scant knowledge of its historical origins. It was only through the guidance of an 80-year-old local named Hou Jun’e that the significance and design of the ancient fortress came to light. His familiarity with the area was key in uncovering the pathways leading to this historic site and unravelling the mystery. You can find out more below: