First you must understand that Stanford admits small single digit students from China every year. They don’t specifically require anything different but you know one or two spikes are what you should aim for. What I mean by spike are the reach high end achievements in academics, social activities etc. You must demonstrate international level of competence and competitiveness to get into Stanford. Also remember Stanford currently runs on REA, which means you will have to give up many good colleges for Stanford. No easy choice!