"Perhaps China's communist leaders view this as a form of payback for the Opium Wars that occurred nearly 200 years ago, in which the UK forcibly demanded to be able to sell the drug to the Chinese. But it also serves as a way to weaken a contemporary opponent; the Chinese government benefits when young and middle-aged American adults are addicted to and dying from drugs."

https://www.newsweek.com/fentanyl-leading-cause-death-young-americans-china-shipping-it-here-opinion-1733011