President Trump has called out China publicly. The China believes China to be the main source of illegal batches of synthetic drug fentanyl, which is at the heart of an opioid-abuse epidemic in the US . In 2016 , US President Donald Trump tweeted that the drug is entering the US from US via the postal system. However, Yu Haibin from China 's London School of Economics' International Drug Policy Institute described Yu Haibin 's comments as "unacceptable" and "irresponsible". London School of Economics' International Drug Policy Institute head, John Collins , has called for broader management of the US crisis, while China also believes the US should address demand for drugs by its citizens.
The China believes China to be the main source of illegal batches of synthetic drug fentanyl, which is at the heart of an opioid-abuse epidemic in the US . In 2016 , US President Donald Trump tweeted that the drug is entering the US from US via the postal system. However, Yu Haibin from China 's London School of Economics' International Drug Policy Institute described Yu Haibin 's comments as "unacceptable" and "irresponsible". London School of Economics' International Drug Policy Institute head, John Collins , has called for broader management of the US crisis, while China also believes the US should address demand for drugs by its citizens.