In West Qishi Village, in Luling, there was a field of fifty to sixty mu (a mu is about 6.7 acres), shaped like an axe. A pair of brothers were discussing its division, and the left and right of it being unequal, they argued ceaselessly, and eventually presented a case to the officials. After one or two years had passed, it was still unresolved. One day, a black cloud arose on all sides and a single strike of lightning scored a single line like that from a plough, from top to bottom, straight across the field, the mu divided as if by a carpenter’s angle, the cun (inches) entirely equal, and afterwards the brothers who owned the field abandoned and ceased their lawsuit. To this day the place is called Thunder God Field. From this it can be understood that the heavenly authorities understand earthly geometry, and that people should take this as a warning.
Anon., Huhai xinwen yijian xuzhi, 後2.222 (Tale 394):
Yuan Haowen 元好問, Chang Zhenguo 常振國 (ed), Xu Yijian zhi 續夷堅志 (Continued Records of the Listener), and Anon., Jin Xin 金心 (ed.), Huhai xinwen yijian xuzhi 湖海新聞夷堅續志 (Continuation of Records of the Listener with New Items from the Lakes and Seas) (Beijing: Zhonghua shuju, 1986).