Tong Li (1048-1098), an eminent monk of the Liao dynasty of China, who formulated a repenting procedure named Diamond Confession Ritual, was famous for his repenting ideal and method of his time. He was honored as the Primary Leader of Repenting at Imperial Palace by the King. Diamond Confession Ritual was carved in the stone around 1093-1095 A.D. Diamond Confession Ritual is rich in content, which includes converting, worshipping, requesting, highly praising Buddha, dharma, monk, praising life world, praising pure mind, confessing, desiring, and delivering achievements to others. Diamond Confession Ritual is not only comprehensive in the general procedure, resembling similar procedures such as Wufa (five dharma) and Shike (ten aspects), but it also stands out for its uniqueness. It was developed from Prajñāpāramitā Diamond Sutra. The various items of repentance are not isolated but naturally integrate as a whole. The thoughts of Diamond Confession Ritual belongs to the categories of Mind Confession and Confession of Void of Physical Existence introduced by Dao Xuan (596-667).