1. The strokes of the word "quantity" in his works are too long and thin, while the thickness of the strokes of Mr. Liu's official script is not particularly obvious.
2. The right part of the word "Bo" seems a little wide, while the vertical line around the word "white" in Mr. Liu's official script is bent inward.
The "time" and "book" of signature are also quite different from Mr. Liu's handwriting.
4. There are some words that are different from Mr. Liu's original works to varying degrees.