Chairman Mao's calligraphy is self-contained, and the ink treasure left behind is unattainable. The picture below is Chairman Mao's letter to Comrade Shaoqi, and if as far as calligraphy is concerned, there is no ancient person before it, and there is no one who has come after it, and the pen has gone to the dragon and snake, and the grass saint Zhang Xu has to be amazed. A generation of great men, a generation of calligraphy masters!