How does Su Shi evaluate Xu Hao's calligraphy?

Su Shi also commented: "The reason why Xu Hao's calligraphy is so expensive is because he tries to express his words, which is what Du Fu said. At present, some pen makers' pens are full of ink, and when they are written, they become fat books and have no spirit. Only by writing with Wu Shuo's pen can they be as satisfied as possible. "Visible Wu Shuo pen capability, at that time is unparalleled.