2. Yan's calligraphy not only influenced later calligraphers, but was also ridiculed as "vulgar style".
3. "Yan Ti" is aimed at Yan Zhenqing's regular script. Its regular script structure is square and dense, the strokes are horizontal and light, the strokes are round and thick, and the momentum is solemn and vigorous.
4. Yan Zhenqing was an outstanding politician and calligrapher in the middle Tang Dynasty. His "Yan Ti" regular script is called "four masters of regular script" with Zhao Mengfu and Liu Gongquan, and "Yan Gu" with Liu Gongquan.