Abstract：The say in foreign policy is mostly dominated by Western countries, although the international power system is increasingly multi-polarized since the end of the Cold War. Exploring the fact that the national strength mismatches its say in foreign policy contributes to the understanding and construction of Chinas international say. Existing literature holds the say in foreign policy finds its foundation in whether the discourse met with the “universal value” and whether a communication platform could be established based on communities. The paper argues that asymmetric information leads to such a mismatch. The costly signal, which contributes to lowering the level of asymmetric information through localized and professional strategies and international institution, is pivotal in gaining a corresponding say in foreign policy.