What was Dr. Ruan appealing about to the Supreme Court? (what law and section)

What do scienter and mens rea mean, in the context of this case? From the last paragraph of

the majority decision, before Justice Alito's concurrence, what did the Supreme Court hold on

this issue and why? So, what might happen next in Dr. Ruan's case? Please give your analysis of

this case, and develop your analysis.