Trump will explain tariffs on electronics on Monday

In President Donald Trump's first posts on his conservative social media platform since the 104% tariffs on Chinese imports went into effect, Trump didn't mention those new duties explicitly, only saying that companies should manufacture in America.

"This is a GREAT time to move your COMPANY into the United States of America, like Apple, and so many others, in record numbers, are doing," Trump wrote in a post.

He encouraged companies by saying they'd pay "ZERO TARIFFS." He added, "DON'T WAIT, DO IT NOW!"

-ABC News' Michelle Stoddart

Billionaire Trump supporter Bill Ackman is calling for a 90-day pause so the president can "accomplish his objectives without destroying small businesses in the short term."

In a lengthy post on X, Ackman warns that if Trump "doesn't pause the effect of the tariffs soon, many small businesses will go bankrupt."

"Medium-sized businesses will be next," Ackman added.

China on Wednesday said it would increase its reciprocal tariffs on U.S. goods to 84% from the previous 34%, per a statement from the country's Finance Ministry.

The ministry's statement said escalating U.S. tariffs were a "mistake," adding: "China urges the U.S. to immediately correct its wrong practices, cancel all unilateral tariff measures against China and properly resolve differences with China through equal dialogue on the basis of mutual respect."

The measure came after President Donald Trump's additional tariffs on Chinese goods came into force just after midnight, bringing the total rate of tariffs on Chinese goods to 104%.

-ABC News' Karson Yiu

Chinese Foreign Ministry spokesperson Lin Jian told reporters at a Wednesday briefing that Beijing "will continue to take resolute and strong measures" in the face of President Donald Trump's latest tariffs.

China, Lin said, "stands ready to work with all parties to uphold multilateralism" and promote "globalism."

"We will not let anyone take away the Chinese people's legitimate right to development," Lin said. "We will not tolerate any attempt to harm China's sovereignty, security and development interests. We will continue to take resolute and strong measures to safeguard our legitimate rights and interests."

"China stands ready to work with all parties to uphold true multilateralism, jointly oppose various forms of unilateralism and protectionism, diffuse risks, address challenges and promote a universally beneficial and inclusive economic globalization," Lin told reporters.

The imposition of tariffs, the spokesperson said, drives up costs of shipping, increases inflation, undermines global stability and "hurts" U.S. interests.

"We urge the U.S. to correct its wrong decision," Lin added.

-ABC News' Karson Yiu