Welcome to Foreign Policy ’s China Brief. The highlights this week: We take a look at the increasingly strained history of ethnic ties between China and Mongolia , Japan’s new prime minister makes clear her stance on Taiwan, and China shines at the annual U.N. climate conference . Sign up to receive China Brief in your inbox every Tuesday. Sign up to receive China Brief in your inbox every Tuesday. Sign Up By submitting your email, you agree to the Privacy Policy and Terms of Use and to receive