Seeking for true-ness is the core concern of the people of Hong Kong during the Umbrella Movement. That search starts from the political structure (true universal suffrage), and continues through into the formation of identity (true Hongkongese). This article illustrates how the Umbrella Movement has provided the people of Hong Kong with an experience of a truthful politics which is different from the current realpolitik. It sets out to see Hong Kong as their homeland, while developing a new language in terms of political localism. Nevertheless, there is a tendency for such political localism to become too narrow, exclusive and sentimental. The ecumenicity of the church interpreted in the light of Wolfhart Pannenberg’s theology is a different social imaginary. It can challenge both the inclination to narrowness and exclusivism of political localism, and the authoritarianism of the Chinese authorities. It possesses the potential to enrich the people of Hong Kong by allowing them to see that the unity of humankind (creation) is the ground of politics.