Correction to: Nature https://doi.org/10.1038/s41586-020-2849-9 Published online 28 October 2020

In the legend of Fig. 2 of this Article, owing to an error during the production process, panels a and b were inadvertently labelled ‘northeast China (within 38–54° N, 120–135° E)’ and panels c and d were inadvertently labelled ‘southwest China (within 18–30° N, 95–110° E)’, rather than the other way around. The figure was correct. This error has been corrected online.