China and the
United States have only "limited" cooperation in stopping fentanyl smuggling, a Chinese narcotics official was quoted as saying on Tuesday, after complaints
China isn't doing enough to help fight an opioid crisis in the United States.
U.S. officials say China is the main source of illicit fentanyl and fentanyl-related substances that are trafficked into the United States, much of it through international mail.
China denies that most of the illicit fentanyl entering the United States originates in China.