Part 13/16:
Adding to the intrigue, a similar subterranean complex was uncovered nearby in 2000—the Hashan Grotto—containing 36 chambers with comparable architectural features. Dating to roughly 1500 years after the Long Yu Caves, these structures may reflect a cultural memory or attempt to replicate the earlier, more mysterious caverns.
However, the absence of historical records and the advanced engineering techniques suggest that these underground complexes were either lost to time or purposefully concealed from the public and official archives.