This is very difficult. According to official website, a medical major in Smosley, the academic level of American universities is beyond doubt, attracting excellent doctoral students from all over the world, so it is very difficult to apply. The annual salary of a doctor in an American university is about 40,000 to 60,000 yuan, and that of a national laboratory is about 60,000 to 80,000 yuan, so even a postdoctoral fellow at the University of Hong Kong in China is hard to apply.