President Donald Trump smiles in the East Room of the White House in Washington, D.C. on September 12, 2018.

President Donald Trump said Tuesday the U.S. is in a "very strong" economic position, and claimed that interest rates and investment opportunities are attracting "massive amounts of money from China."

"Massive amounts of money from China and other parts of the world is pouring into the United States for reasons of safety, investment, and interest rates!" the president said on Twitter. "We are in a very strong position. Companies are also coming to the U.S. in big numbers. A beautiful thing to watch!"

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The president's comments came amid an intensifying trade war between the U.S. and China, with the White House announcing last week plans to slap additional 10% tariffs on $300 billion worth of Chinese imports.

That triggered a wave of retaliatory rhetoric and action from Beijing, which has asked its state-run companies to stop buying U.S. agricultural products.