Zhang Xu, one of the top ten painters in China, was born in 685, so he was born in 759. He was a calligrapher in the Tang Dynasty, especially good at cursive writing. Zhang Xu's calligraphy skills are profound, and he created a model of wild grass style with his exquisite brushwork and bold temperament. His hobby is drinking, and the world calls him "Zhang Dian". Together with Huai Su, it is called "Drunken Weng", and with He, Zhang and Bao, it is called "Wuzhong Sizi". Because of his love of drinking, He and He are called "Eight Immortals of Drinking", and Zhang Xu's cursive script, Li Bai's poems and songs, and Pei Min's sword dance are also called "Three Musts" by the world.