Starting from Guhuo Bird

The setting is taken from Journey to the West. There are five immortals in the universe: Heaven, Earth, God, Human, and Ghost. There are five kinds of creatures: naked, scaled, feathered, and shelled. Ancient China used the concept of outer covering as a basis. Naked creatures are those without feathers, scales, or armor (including humans). The human among the five immortals refers to human immortals, not humans. The *Da Dai Li Ji* (Record of Rites by Dai the Elder), in its chapter "Yi Ben Ming" (On the Fundamentals of Change), states: "There are 360 ​​naked insects, and the sage is the leader among them." Sun Xidan's commentary on the *Li Ji* says: "All creatures without feathers, scales, or shells, such as frogs and earthworms, are naked insects. Humans are the most intelligent of the naked insects." Insects are a category, feathered insects are birds. The *Da Dai Li Ji*, in its chapter "Zeng Zi Tian Yuan" (On the Heavenly Circle of Zengzi), states: "Those that are insects are called 'Lin,' and those that are feathered insects are called 'Long.'" Wang Chong's *Lun Heng* (Discourses Weighed in the Balance), in its chapter "Zao Hu" (Encountering the Tiger), states: "The tiger is an insect; humans are naked insects. When insects are hungry, they eat naked insects; what difference is there?" Scaled insects are those covered in scales, such as fish and snakes, Shelled insects are those covered in shells, such as insects. The *Da Dai Li Ji*, in its chapter "Zeng Zi Tian Yuan" (On the Heavenly Circle of Zengzi), states: "Those that are shelled insects are called 'Long,' and those that are scaled insects are called 'Long.'" Insects are essentially equivalent to shelled insects. (The above is based on encyclopedia entries.)