obsession. >> xi jinping often talks about the fall of the soviet union as a lesson for china. >> what accounted for it? what were the stresses? >> why did the soviet union collapse? >> xi's answer -- don't try to be too american. >> even though china has emulated america, china still, after all, a socialist country. >> whatever economic reforms they engage in, you cannot allow political liberalization to accompany it. >> and he would point to the soviet example as a sign that that's the risk we face. >> and that means the party must be seen as strong, clean, and legitimate. it's ironic, because no one has suffered more under communism than xi jinping himself. to understand it, we have to go back to tell the dramatic story of xi's childhood.