What is the story of Wu Shuo recorded in Flying Dust Record?

A story written by Wang Mingqing, a poet in the Song Dynasty, can illustrate the artistic achievements of Wu Shuo's calligraphy in big characters: "You said you knew Xinzhou, so you went to the temple to give a speech. Gao Zongyun said,' I have one thing that I regret every time. It is good to clear books. I always change my books, but I never catch yours. It's still in season. Say fear and praise. On that day, the messenger told Genggen to look for old cards, which were still in the library of Tianzhu Temple, and then ordered him to hang them. "