In fact, it is definitely not intentional, because calligraphy itself has no deliberate statement, because it is basically written by hand feeling and understanding of fonts, so naturally there is no intentional reason, it must be due to the influence of some skill.
I believe anyone who has read Sun Shu Pu knows that among these fonts, pen saving and pen pressing are more obvious. Of course, it can also be seen that it is very difficult to copy his font, because it is basically difficult to imitate it completely, because the font also reflects its own characteristics, so it is relatively critical.
Therefore, many people basically practice for a long time when copying Sun's pen-saving and pen-pressing. If you are interested in calligraphy, you can try it, which can also improve our writing level relatively. In a word, Sun's "Book Score" is really not intentional, and it can be said that it has another plan, because it is related to his usual habit of practicing calligraphy and his personal understanding of self-font, and he should learn and imitate more at ordinary times.