Highly recommended read on how China managed to wage a covert war with USA with help of Fentanyl (and other such nefarious supplies).

Blood Money: Why the Powerful Turn a Blind Eye While China Kills Americans

https://www.amazon.com/Blood-Money-Powerful-Blind-Americans/...

Recommend reading "Blood Money" by investigative report Peter Schweizer:-

https://www.amazon.com/Blood-Money-Powerful-Blind-Americans/...