I'm not trying to dismiss what you're saying as a possibility (AMD's behavior in many regards over the last 15 years or so is baffling to the point that a family conspiracy feels surprisingly plausible) but Huang isn't Su's uncle.
They are "first cousins once removed" meaning that Su is the child of one of Huang's cousins. Or put another way, one of Huang's grandparents is one of Su's great-grandparents.
They are "first cousins once removed" meaning that Su is the child of one of Huang's cousins. Or put another way, one of Huang's grandparents is one of Su's great-grandparents.