Ji shi man hua zhuan sheng shu "Lai zi qing shui de hai zi" chu ban li cheng yu jiao ben chuang zuo ce lüe xi tan - Yu, Pei-yun 1967- (Yu shan she chu ban shi ye gu fen you xian gong si, 2023)
Appendix: 4 examples of private Facebook messaging. - You Peiyun's pen name is Zheng Xiaoyun