A spokesperson for the Ministry of Public Security on Friday voiced firm opposition to the US threat of imposing an additional 10 per cent tariff on Chinese exports.

The spokesperson made the remarks in response to a media inquiry on the United States' threatened tariff hike, which is scheduled to take effect from March 4 and cited fentanyl issues as the cause.

The spokesperson said that once again, the United States was using the fentanyl issue as a pretext to impose tariffs on Chinese goods, despite China's stringent anti-drug policies and active international cooperation on drug control.

Beijing has provided support to Washington in addressing the fentanyl issue out of humanitarian concern, achieving notable results, the spokesperson added.

The spokesperson said the root cause of America's fentanyl crisis lies within the US itself, adding that reducing domestic demand and strengthen law enforcement cooperation were the fundamental solutions.

The spokesperson said the US continued to ignore the core issue of drug demand, unfairly shifting the blame onto other countries, which undermined efforts to solve the problem and harmed China-US cooperation on drug control.

Beijing urged the US to preserve the progress in bilateral anti-drug cooperation, and "return to the right path". (Xinhua)