By Richard Van Noorden writing for nature
From the article,
The number of scholars who declare affiliations in both China and the United States on research papers has dropped by more than 20% over the past 3 years, an analysis conducted for Nature has found. That slump seems to be part of a pattern of waning US–China collaboration that is starting to show up in research databases. The number of papers that were collaborations between authors in the United States and China — the world’s two largest research producers — also fell for the first time last year. These signs of falling collaboration are at least in part a result of the COVID-19 pandemic, scholars say, but also of political tensions. These include the effects of the United States’ controversial China Initiative, a policy supposed to prevent espionage that targeted many US academics for not disclosing some of their work or funding in China.