What is the calligraphy secret of Liu Gongquan, a great calligrapher in Tang Dynasty?

The secret of Liu Gongquan's calligraphy of 19: "Write eight jars of water, and the inkstone is stained with black water; Take a hundred parents and you get a phoenix in Yi Long. "

Learn the freshness and fullness of Yan, and also learn the cheerfulness and smoothness of Europe. I learned to be bold and unrestrained, and I also learned the beauty and charm of ladies-in-waiting.

Liu Gongquan often watched others pick sheep and cattle, and studied the skeleton structure, from which he got enlightenment. He also observed the wild geese in the sky, the fish swimming in the water, the running elk and the runaway wild horses, and integrated all kinds of beautiful forms of nature into the art of calligraphy. Year after year, day after day, I learned Liu Ti's original calligraphy painting, which was thin, hard, decent, angular, vigorous and clear-cut.