Chinese leader Xi Jinping is renewing a push for the U.S. to change a decades-old phrase describing its stance on Taiwan independence, a concession that would be a major diplomatic win for Beijing.

China has asked the Trump administration to officially declare that it "opposes” Taiwan independence, according to a person familiar with the matter, who asked not to be identified discussing private information.

The suggested wording is stronger than the Biden administration’s previous statement that U.S. officials "do not support” the self-ruled island seeking formal independence, and would add to China’s campaign to isolate Taiwan on the world stage. The Wall Street Journal first reported the request.