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Couplet: the general name for running script and cursive script. All strokes are end to end. It may be derogatory to describe scrawl. All he writes is practicing calligraphy, and ghosts can't understand it. As a compliment, it can be said that his face is very good, which shows that he has written a good running script. Practicing calligraphy, as the name implies, is to change people's existing calligraphy habits slightly, so that the original "horizontal and vertical" fonts are coherent, which not only accelerates the writing speed, but also forms a unique style of personal writing, which is highly valued by people.