It was a Christmas message that no one saw coming.

On Dec. 25, President-elect Donald J. Trump went on his social media platform, Truth Social, to wish a “Merry Christmas to all, including to the wonderful soldiers of China, who are lovingly, but illegally, operating the Panama Canal.”

Mr. Trump’s claim is false. The Panama Canal is operated by an agency of the Panamanian government, not by Chinese soldiers. In a news conference, President José Raúl Mulino of Panama disputed Mr. Trump’s statements, saying that there were “no Chinese in the canal” beyond those in transiting ships or at the visitor center.

“There is absolutely no Chinese interference or participation in anything that has to do with the Panama Canal,” Mr. Mulino said.

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