The collaborative efforts on climate issues between China and California at the sub-national level serve as a promising foundation for thawing the tensions between China and the United States (see F. Dai Nature 623, 889; 2023). But navigating the reconstruction of the China–US relationship and fostering broad cooperation on climate-mitigation policies between the world’s two largest greenhouse-gas emitters still poses significant challenges.
Competing Interests
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The authors declare no competing interests.