Tens of millions of Chinese now identify as Christians, and the number has grown rapidly, posing challenges for a government that is officially atheist and wary of threats to its power.

As more people in China practice religion, the government continues to toughen oversight, increase religious persecution, and attempt to co-opt state-sanctioned religious organizations.

The U.S. health agency regulates the country’s foods and drugs, among other products. The COVID-19 pandemic and controversy over vaccines and treatments have highlighted the FDA’s role.