I have it. I can share it with you for free using Baidu Netdisk. The link is:
/s/1ja_H3msaw72zQSTgIGqv2w?pwd=1234
Bi Li
Strongness refers to the sense of power revealed in the strokes of words. The art of calligraphy treats characters as human beings and believes that strokes have tendons, bones, blood, and flesh like human beings, and must embody the power of life in them. Pen power is generated not by using strong or brute force when writing, but by using skill based on mastering the performance of the brush. Powerful strokes require the writer to be extremely concentrated, have clear feelings and judgments about every detail of the strokes, and use technology and wisdom to perfectly present the strokes.