What did the Shang script mean when it was first created? How to split business characters into words?

From the point of word formation, this word is inseparable. "Shang" is a pictograph, and Oracle Bone Inscriptions's "Shang" is the shape of an ancient wine vessel with two columns, a big belly and three legs. The original meaning of this word is wine vessel. Here is its Oracle Bone Inscriptions glyph:

Obviously, this word is seamless and cannot be disassembled.

However, Xu Shen did take it apart in Shuo Wen Jie Zi: when analyzing the form, he identified the character as a pictophonetic character and omitted the sound from the chapter. This is based on the analysis of seal script fonts at that time. The seal script font is as follows:

Judging from Oracle Bone Inscriptions's glyph, this analysis is of course unreasonable. Even seal script is a close whole.

"Shang" is not a single word today, but for the convenience of looking it up in the dictionary.