How did Zheng Banqiao discover the calligraphy of "Luanshipu Street"?

When Zheng Banqiao studied calligraphy, he often gestured in the air with his fingers, as if he were possessed. Once, he waved his finger to write in his sleep, and his finger touched his wife's body. His wife cried and said, "Everyone has his own body. How do you scratch my body! " "Zheng Banqiao was surprised. After waking up, he pondered his wife's words silently and understood that it would not be successful to imitate the ancients blindly. Therefore, from then on, he no longer imitated the ancients, but based on his own originality. Finally, he formed his own family, which he named "paving streets with stones".