Purpose This study examines the impact of the $60 billion tariff announcement of the US government on the Chinese exporting firms. In particular, we focus on firms whose revenues are highly dependent on the US economy. Design/methodology/approach This study uses an experimental analysis and event study methodology. The sample includes firms listed in mainland China and Hong Kong stock exchanges that have the highest revenues from exporting to the US. The data are obtained from CSMAR and DataStream. Findings We find that the tariff announcement has significantly negative impacts on stock performance both before and after the announcement, and the impacts are heterogeneous across our sample firms. For A-shares listed in Mainland China, firms with more revenues from the US experience greater price drops on the announcement day, regardless of being in the targeted industry or not. But such a finding is absent from H shares listed in Hong Kong. We also find that for all the firms, greater pricing power can alleviate the impacts of the tariff announcement. Originality This is the first study documenting the heterogeneity of the impact of the tariff announcement and thus contribute to the prosperous studies on the varied firm-level responses in the Chinese stock market, and to the burgeoning literature by filling the gap of the financial market responses to the protectionist policy announcement.