Yan Zhenqing's Calligraphy Story and Calligraphy Characteristics?

Yan Zhenqing, as the representative of the second peak of China's calligraphy, has many stories about his calligraphy. Here are two simple and fun stories:

Story 1: Yellow Mud Calligraphy: When Yan Zhenqing was a child, his family was poor and he couldn't afford pens, ink, paper and inkstone, so he practiced calligraphy on the wall with a bowl full of yellow mud.

Story 2: Resignation: Yan Zhenqing resigned twice and went to Luoyang to learn from Zhang Xu. The second time, Zhang accepted him as a disciple. After Yan Zhenqing took Zhang Xu as his teacher, his calligraphy improved greatly, and Zhang Xu was satisfied with such a good student.

Yan Zhenqing has always been an official in the imperial court, and calligraphy is just a hobby. He led troops to fight with outstanding achievements and integrity. Therefore, like himself, his calligraphy is very broad-minded, full of energy, thick and simple, vigorous and vigorous, known as "Yan Ti", and he is one of the four regular script masters in the history of China calligraphy.