You have basically two options. First, you can prepare to directly apply American Universities from China while attending a current high school. In this case, you have only 17th months to accomplish good SAT and TOEFL scores, excellent GPA, outstanding Extra Curricular activities if you aims to apply to top universities in USA. Although it sounds somewhat easy, actually to build a quality application to top universities is quite time consuming and takes a lot of energy. You can surely focus on this path.。