Gu Xingwu is a young boy in the village who was present when Xingwen ran home after the incident. He ran alongside Xingwen and Wang Xiaolong and witnessed Xingwen's fall at the edge of the field ridge. Gu Xingwu is not present during the confrontation but his testimony would support the children's account of events. He is mentioned as one of the children who ran home fast with Xingwen.
