Wuxi Gong Mian came to Jiaxing as a magistrate and boarded Yuyan Building in his spare time. Unfortunately, its desolation and destruction humiliated the beautiful scenery of South Lake. So rotten wood was replaced, repaired and repainted. In the south of the building, he sorted out a piece of land dozens of steps square, like a platform, dug into a pool, which can go down with the stone steps, and there are fish in the pool. There is a stone wall next to it, engraved with the three characters of "Diao Ao Ji" written by him personally, which has high hopes for him. The characters are strong and agile, and they have the charm of Su and Huang, the famous calligraphers of the Song Dynasty.