People in at least 7 states have received mailed pouches of unidentified seeds. The packages are marked "China Post" and feature Chinese characters.
State departments of agriculture have warned residents not to open the seed packets... and "do not plant the seeds".
The NY Times suggested it may be a "brushing scam". One can also imagine a form of biological warfare, introducing invasive species (...not that there is any evidence of such an attack by China...)
http://www.nytimes.com/2020/07/26/us...hina-mail.html