Zhang Xu's works have been handed down to this day, including Four Ancient Poems on Wild Grass, A Thousand Words on Painful Belly and Preface to Langguan Stone in Shangshu Province. "Abdominal pain post" is engraved in the last paragraph of the inscription written by monk Yan in Anbeilin, so it is also called. He said in the book: "The sudden abdominal pain made me unbearable. I wonder if it is caused by cold and heat. I use rhubarb soup to make casual clothes. Both cold and heat are beneficial. What's the plan? Not as good as clinical. " Pen-lifting, pen-pressing, pause and frustration are all clear and varied. "Four Ancient Poems" is written in five-color pen and ink. Xie Lingyun's Poems and Yu Xin's Poems are now in Liaoning Museum. Xuan He Shu Pu is often mistaken for Xie Lingyun. This post shows its unique style. In addition, reading the statutes of the four ancient poems and their running scripts, such as throwing them from the air, is fluent and elegant, which can't be done except for talented people.