Zheng Peng (; born July 6, 2002), professionally known as Zi Yu (), is a Chinese singer and actor. He gained widespread recognition for his lead role in the web novel-adapted drama series Revenged Love (2025).
Zi Yu was born Zheng Peng on July 6, 2002, in Lianyungang, Jiangsu, China. He attended the Department of Performance at Beijing Contemporary Music Academy.