• President-elect Donald Trump plans to raise tariffs by an additional 10% on all Chinese goods coming into the U.S., according to a post Monday on his social media platform Truth Social.
• The post immediately followed one in which Trump said his first of "many" executive orders on Jan. 20 would impose tariffs of 25% on all products from Mexico and Canada.
• Trump had threatened tariffs of 60% on Chinese goods while campaigning for president.

BEIJING — President-elect Donald Trump plans to raise tariffs by an additional 10% on all Chinese goods coming into the U.S., according to a post on his social media platform Truth Social.

The post immediately followed one in which Trump said his first of "many" executive orders on Jan. 20 would impose tariffs of 25% on all products from Mexico and Canada. Such a move would end a regional free trade agreement.

Trump is set to be inaugurated as the next U.S. president on Jan. 20. He cited illegal immigration and illicit drug trade as reasons for the tariffs.

"I have had many talks with China about the massive amounts of drugs, in particular Fentanyl, being sent into the United States – But to no avail," Trump said. He claimed that contrary to promises, Beijing did not impose the death penalty on such drug dealers.

Fentanyl, a synthetic opioid, is an addictive drug that's led to tens of thousands of overdose deaths each year in the U.S.

Reducing illicit supplies of the drug, precursors of which are mostly produced in China and Mexico, has been an area in which Washington and Beijing have agreed to cooperate.

"No one will win a trade war or a tariff war," Liu Pengyu, a spokesperson for China's embassy in the U.S., said on X. He described bilateral economic and trade cooperation as "mutually beneficial in nature."

Liu pushed back on Trump's claim that China has done little to stem the flow of fentanyl to the U.S. He said that both countries' counternarcotics teams have regularly communicated since Chinese President Xi Jinping met with U.S. President Joe Biden in November 2023.

"Drugs are pouring into our Country, mostly through Mexico, at levels never seen before," Trump said. "Until such time as they stop, we will be charging China an additional 10% Tariff, above any additional Tariffs, on all of their many products coming into the United States of America."

Trump had threatened tariffs of 60% on Chinese goods while campaigning for president.

A 10% tariff on China is lower than the 20% to 30% that markets expected, Kinger Lau, chief China equity strategist at Goldman Sachs, said Tuesday on CNBC's "Squawk Box Asia." He expects China will cut rates, increase fiscal stimulus and moderately depreciate its currency in order to counter the economic impact of increased duties.

Mexico is the largest trading partner of the U.S., followed by Canada and China, according to U.S. data as of September.

On Tuesday, Mexican President Claudia Sheinbaum Pardo signaled that her country was prepared to respond to any new tariffs from a Trump administration with retaliatory tariffs of its own.

"It is not with threats or tariffs that we will address the migration phenomenon, or drug use in the United States," she wrote. "One tariff will be followed by another in response, and so on, until we put our communal companies at risk."

Canadian Prime Minister Justin Trudeau said Tuesday that he spoke to Trump by phone that morning.

"It was a good call," Trudeau told reporters, without specifically mentioning the tariff threats. "This is a relationship that, we know, takes a certain amount of working on, and that's what we'll do."

The U.S. is China's largest trading partner on a single country basis, according to China customs data. The Asian country's largest regional trading partners are the Association of Southeast Asian Nations and the European Union.

China and the U.S. still have a "really important commercial and economic relationship," Andy Rothman, investment strategist at Matthews Asia, told CNBC's "Street Signs Asia" on Tuesday. He said that China is unlikely to take reciprocal action for now, and noted that Beijing has not typically responded aggressively.

The U.S. dollar traded about 1% stronger versus the Mexican peso, and 1.4% higher against the Canadian dollar as of Tuesday morning. The greenback climbed around 0.2% against the Hong Kong-traded Chinese yuan.

— CNBC's Hui Jie Lim and Anniek Bao contributed to this report.