I dare not make any unreasonable comments. Only those who know calligraphy can accurately summarize his style characteristics.
My bad feeling is that the style of the philosophy characters in the official document signature and the one-stroke signature are the same. The overall style is strong and powerful, the strokes are evenly arranged, and the center of gravity is stable and elegant.
The styles of Liu characters can vary.
The character "Liu" in the official document signature looks like a "Hezi" at first glance, but upon closer inspection, it is a character "Liu". Although it is a bit exaggerated, it is not out of context.
The character "Liu" in a single draw may be for the overall effect of the draw. It is long and horizontal, which seems far-fetched. The connection with the character "Liu" and the character "Zhe" is not big.