In fact, Huang Fu Wuxia was actually pleasantly surprised to discover defective graphene products.
She stated very clearly, "I will formally inform the Nangong Family about this matter... With this as a pretext, I'd like to see if the Nangong Family still has the audacity to refuse to hand over the management of the Chaos Plane."
Nangong Youjiu, in order to gain Feng Jun's forgiveness, had long expressed that they would no longer deal in graphene in the Chaos Plane. But his statement was just his own; the Nangong Family wasn't dictated by him alone, and many opposed abandoning the graphene business.
Indeed, the Nangong Family was at odds with Feng Jun, leading to Ji Buseng dropping by to cause trouble, which cost the Nangong Family greatly. Yet the connection between this cause and effect had no direct link to the graphene trade in the Chaos Plane.