Cao Lei is Tang Sufeng's younger son. He is mentioned as being involved in a scandal with the Ding family's daughter-in-law, a married woman who already has a husband. This scandal has been circulating at the factory for a while. Shu Yuan exposes this scandal to humiliate Tang Sufeng and shut down her gossip. Cao Lei himself does not appear in the text but is referenced as part of the family drama.
