Because his concubine had fallen ill the Jinshi scholar Zheng Zong did not want to sit the civil examination. The concubine told him: “You must not abandon your chance for a woman.” As she was so determined in her request, Zong thus entered the capital. That spring he failed the examinations and returned east. When he got home his concubine had died. Ten months after her burial, late at night, he happened not to have gone to bed, and heard the noise of someone moving outside the room. When he opened the door to look, it turned out to be his dead concubine. He invited her into the room, sat her down, and asked what it was that she needed. She only wanted tea, so Zong personally boiled some for her. When she had finished sipping it, Zong, because their young children were sleeping, asked whether she wanted to go together and see them. The concubine said: “We must not. They are young, and I fear it could be a shock.” When she had finished speaking she said farewell, and, as soon as she reached the threshold, vanished.
Li Fang 李昉, et al., Taiping guangji 太平廣記 (Extensive Gleanings from the Era of Great Harmony), 10 vols (Beijing: Zhonghua shuju, 1961), viii, 352.2786: