2, the structure is positive, the middle palace of the font (that is, the center of gravity of the word) is impartial, just in the middle of the font, making the whole word very calm.
3, the brushwork is correct, the pen heart (that is, the pen tip is kept at or near the stroke center line when lifting the pen), and the pen is full of power.
Wei Bei talks a lot, but his body is not straight, and he takes a steep and beautiful route.
The original fonts of some calligraphers in the Qing Dynasty were also incorrect.
As for the brushwork, some copybooks are mainly written by the sideline, not by the center. Details can be searched online.
To say that the form, structure and brushwork are correct, I personally think that Qin Xiaozhuan should be the first.