President Trump and his allies have tried to paint the Democratic nominee, Joseph R. Biden Jr., as soft on China, in part by pointing to his son’s business dealings there.

Senate Republicans produced a report asserting, among other things, that Mr. Biden’s son Hunter “opened a bank account” with a Chinese businessman, part of what it said were his numerous connections to “foreign nationals and foreign governments across the globe.”

But Mr. Trump’s own business history is filled with overseas financial deals, and some have involved the Chinese state. He spent a decade unsuccessfully pursuing projects in China, operating an office there during his first run for president and forging a partnership with a major government-controlled company.

And it turns out that China is one of only three foreign nations — the others are Britain and Ireland — where Mr. Trump maintains a bank account, according to an analysis of the president’s tax records, which were obtained by The New York Times. The foreign accounts do not show up on Mr. Trump’s public financial disclosures, where he must list personal assets, because they are held under corporate names. The identities of the financial institutions are not clear.