Introduction to the pergola: The theoretical core of Huayan Sect mainly includes two aspects: "the origin of the Dharma Realm" and "harmony and harmony". The origin of the Dharma Realm (referring to the "Tathagata Store's pure mind") is that the spiritual "One True Dharma Realm" or "One Mind Dharma Realm" (also called the true Buddha-nature and the Tathagata Store's own pure heart) is the essence and origin of the material world. All phenomena in the objective world arise from the "pure mind" and "according to conditions". Without the "one mind", there is nothing else. Although various phenomena vary greatly under the influence of this "one mind", they are all unified by the "one mind" like "the moon reflects thousands of rivers". The so-called "integration without hindrance" is also called the phenomenon of "endless dependent origination". Although it is a relationship between body and function, the body and function are not separate and separated, but the body and function are fully integrated and integrated, and they are integrated into each other. , harmonious and harmonious. Therefore, if you lift a speck of dust, it will fill the universe, if you relax a thought, it will last for nine lifetimes. This thing is that thing, this law is that law, everything is okay, and all laws are equal. Under the control of the idea of ​​"integration without hindrance", Huayan Sect reconciles the thoughts of various schools within Buddhism, and advocates the integration of Buddhism, Confucianism and Taoism externally. This idea of ​​integrating everything is a reflection of the unification situation of the prosperous Tang Dynasty.