As opposed to wuxing (无形 incorporeal), youxing (有形) literally means“corporeal”or“existing in a physical form.”Forms, which are measured by size, length, weight, and so forth, help to differentiate one thing from another. The measurements of the corporeal serve as reference points for nomenclature. In ancient times, some people believed that the generation and changing of the corporeal relied upon incorporeal nature or origin, while others believed in the self-generation of the corporeal and rejected the existence of an incorporeal nature or origin.

Things do have forms, and forms have names. Those who give appropriate names to forms are called sages. (Guanzi)

Anything in a physical form is easy to cut and segment. What is the reason behind this? If a thing is corporeal, it must be either short or long, small or big, square or circular, solid or fragile, light or heavy, white or black. (Hanfeizi)