Because those carvings are oracle bone script. He hasn't studied oracle bone script much, but he happens to know the meaning of these characters.
From left to right, they are: one, 2, 3, four, five, , seven, eight.
The same eight passages, arranged in numerical order again; this can't be a coincidence.
"This underground palace definitely has something to do with the Komi Primitive Forest's cave."
Song Yun made a judgment in his heart; he didn't believe this was a coincidence.
"It seems the one who built this underground palace and the cave is the same person, and surely a Huaxia person."
Song Yun pondered in his heart, his gaze landed on the "seven" passage.
Last time he went this way; he decided to choose this number again this time.
He believes seven is his lucky number.
Of course, there's another reason.
The seventh passage has dense footprints, meaning that the Beast Spirit Clan who came earlier also chose this path.
