I am unable to create a summary of the requested article because the search results provided do not include the article titled "International conferences must include China" from Science, Volume 391, Number 6791, March 2026. The search results only contain general information about conferences in China and the discussion of US-China cooperation in science and technology, not the specific article you listed. In order to create an accurate and factual summary, I would need access to the full text of this specific article.