【明報專訊】It was mid-autumn and a noble man called Cao dropped in (順道探訪) on his friend Wang while he was passing by a village. He was on his way to the capital, where he was to take the imperial examination. He asked to stay overnight, but his friend's house didn't have enough bedrooms. "Hey Cao, why don't you wait until next year? You had better not stay here so long," Wang advised. "There was a spooky wooden house nearby, which always scared the life out of the villagers." "Nope. I must not miss this chance." Despite his friend's warning, Cao insisted on staying in the wooden house. Finally, Cao settled down in a study in that wooden house.