Is China smuggling the fentanyl into Mexico? The problem isn't China, it's 100% Mexico. China doesn't ship fentanyl or the base ingredients to the US illegally because we have restrictions and controls. Mexico doesn't, if anyone checked the Chinese companies that are shipping fentanyl and base ingredients, they will find those transactions are perfectly legal. If Mexico had the same import controls we do the fentanyl and base ingredients would have to be shipped somewhere else. This is a Mexican problem, they need to be held accountable.