JiuhuaShan (Mt. Jiuhua) is one of four sacred mountains in China. dedicated to Ksitigarbha or Dizhang Pusa. While there already were Buddhist temples and Indian priests leading the temples by around 400AD, at 757AD there was a zen master, formally a Silla prince named Kim Gyo-gak, practicing in a small mountain cave eating small amount of rice and mud.
After the locals discovered this zen/chan master, within a short period of time the people built a temple and invited the master to teach. He stayed at this mountain and taught for 75 years till age of 99. After his death, his corporeal body remained intact and was on display until circumstance deemed it necessary to hide his body, during the Tang Dynasty (1000+ years ago). By Ming Dynasty (300-700 years ago) they built a temple over the location of where the body is hidden. People believed that he is the reincarnate of Dìzàng Pusa, (Japanese: Jizo, Sanskrit Ksitigarbha)