The
In the 8th year of the 9th year of the 8th century, the Buddhist cosmology was divided into three parts: the 1 Sumi world (Isuza world), the basic unit that constitutes a single universe (3,000 worlds) It refers to the nine mountains and the eight mountains surrounding the mountains, including Sumiyama, located on the ground. In other words, there is Sumiyan, the first mountain in the center, followed by Sumiya Sea, the first year that surround Sumiyama, and again, the second mountain, Jisansan Mountain), and then the second year, which surrounds Jisan Mountain. In this way, there are 8 mountains and 8 seas, and at the end is the 9th mountain, the Iron Mountain. Because the seven mountains of the nine mountains, except for the first mountain of the four mountains and the seven mountains, except for the nine mountains of iron, which are made of iron, are all made of gold, (七 金山) is called.