"Chuyun Mountain" instance is the Quasi-E-level dungeon chosen by the system for Qian Qi.
This instance is said to be very mysterious. The military has sent awakened warrior explorers many times, all of whom perished without returning, hence it is recognized externally as a dungeon of C-level or higher.
However, because the gap fluctuations in the Chuyun Mountain Dungeon have always been stable, it's ranked at the bottom of the strategic requirements, and none of the advanced awakeners from several families have attempted to conquer it.
Thus, this became a bargain for Qian Qi.
As for why none of the awakened warrior explorers sent by the military returned...
It's because once inside the instance, they appear directly in the sky, and if unprepared, they can only end up falling into the abyss below, potentially dying from the fall.
