United States has pressed China to restrict exportation of fentanyl drug

China is said to be the main manufacture of synthetic drugs that have been blamed for public health crises in the US, Canada and Australia among other countries. [Photo: AFP]

The US-China trade war truce includes a pledge by Beijing to tackle another lucrative -- and deadly -- export: fentanyl, a potent opioid ravaging US communities.

The United States has pressed Beijing to do more to crack down on the drug, as smugglers from China are suspected of being the main suppliers of the narcotic, which is 50 times stronger than heroin.