How to write the national seal and official script?

(1) Lishu: The smooth, neat and exquisite structure of Lishu is beautified as upward provocation, with different degrees of severity, which enhances the beauty of the plastic arts of calligraphy and has diverse styles, greatly improving the artistic appreciation value. (2) Seal script: The strokes of calligraphy are thin and straight without ups and downs. Division: (1)