In some religious and philosophical systems, "constancy" is also used as one of the essential characteristics of the universe and life, representing stability, balance and eternity. For example, what Buddhists call "Tathagata's permanent residence" means that Buddha's nature is permanent; Taoism, on the other hand, emphasizes that everything in the universe flows naturally and changes constantly with the thought of "Tao is often nameless and simple", but the ontology in the world has no beginning or end.
"Heng" is not only a name, but also widely used in many fields. For example, in mathematics, "identity" refers to the equal relationship between two expressions under certain conditions; In physics and chemistry, "constant theory" is the general name of some basic principles. It can be seen that there are many profound thoughts and meanings behind the simple word "Heng", which makes it a word full of cultural, historical, scientific and philosophical connotations.