Hi, this is Colum Murphy in Beijing, where Chinese officials are throwing a few sharp elbows in their running rivalry with the US.

Trump cited the fentanyl issue as the reason for imposing a 10% tariff on all Chinese imports in early February, on top of any existing duties. He doubled that to 20% earlier this month. He also has cited fentanyl, along with other reasons, for imposing tariffs on Canada and Mexico.

U.S. President Donald Trump will not let up pressure on tariffson Mexico, Canada and China related to their handling of fentanyl, Commerce Secretary Howard Lutnick said on Sunday, despite recent holds put on announced tariff measures.

Canadian and Chinese officials say they were already helping reduce fentanyl smuggling. Prime Minister Justin Trudeau said fentanyl crossing the northern border is "near zero."

Generic drugmakers and hospital pharmacists warn that added financial pressure from tariffs could strain the nation's generic drug supplies.

Business leaders and economists have warned that China's exports are likely to suffer significantly due to the intensifying tariff conflict with the United States, as reported by Radio Free Asia (RFA).

Walmart is getting caught in the middle of an escalating trade war between the United States and China. Chinese officials confirmed on Thursday they had met with executives from the US retail giant, following a news report that it had pressured its suppliers in China for discounts to cope with rising tariffs imposed by Donald Trump.