Introduction:
There is a place called Xianbei Cave in Jiagedaqi in Daxing'an Mountains, also known as "Gaxian Cave" in Daxianbei Mountain. The cave is dark and mysterious, located in a dense primeval forest. Gaxian Cave is not only the birthplace of the Xianbei people in the Northern Wei Dynasty, but also the ancient blessed land of the Oroqen people. Legend has it that in the ancient flood era, Gaxian Cave was the entrance to the underworld, and was connected to the "sea eye" under the East China Sea.
