Generally speaking, Tathagata refers to Tathagata. Tathagata is the highest-ranking Buddha in Tantric Buddhism. In order to educate all sentient beings, he created four deputies, named Sifang Four Buddhas, who were in charge of the four directions of east, west, north and south, namely, the Treasure Buddha in the South Joy World, the Acheng Buddha in the East Fragrant World, the Amitabha Buddha in the West Elysium World and the Hidden Buddha in the North Lotus World. The Four Buddhas and the Great Sun Buddha are called Five Dhyani Buddhas. The Piluzenafo in the center represents the body and wisdom of the dharma circle; Oriental Acheng Buddha (motionless Buddha) represents the wisdom of the great circle mirror; Nanbao gives birth to Buddha, representing the same intelligence; Amitabha in the west represents wonderful observation and wisdom; The subtle Buddha in the north (also known as the Buddha who has achieved nothing) represents the wisdom of success.

The relationship between Tathagata and Amitabha is like the relationship between the emperor and government officials. Government officials have absolute sovereignty over the places under their jurisdiction, all taxes belong to him, they have their own army, they can make laws, and they are really masters, but they still have to listen to the emperor. But for the emperor, he should not intervene in the territory under the jurisdiction of the provincial capital. This is the relationship between Tathagata and Amitabha.

Generally speaking, Tathagata is the boss, Amitabha is the younger brother, and the younger brother is powerful because the boss behind him is cruel enough.