Mount Jiuhua
Kim Gyo-gak had studied in Tang China in his early life. After going back, he decided to give up his life in the royal family to be a monk and then left to Mount Jiuhua with his dog. He became a monk under the Chinese name Dizang "Kṣitigarbha". The dog followed the dharma as well and often acted as Ksitigarbha's guard. When Kṣitigarbha became enlightened, the dog became Diting who guards hell.