"Han Fang" and "Fang Mo" are nicknames for calligraphy. In Tang Xuanzong's poem, it is said that "saints inherit the Korean side, and thousands of years are like gods". It is more convenient for the public to understand.
The word "Danqing" first appeared in the article "Weaving Gold in Qiu Guan, Zhou Li": it is the legacy of Danqing, a precious jade and cassiterite. Over time, the word "painters" refers to painting pigments.