Enlarge / Donald Trump and Chinese president Xi Jinping in Beijing in November.

The Trump administration is looking to widen its trade war with China by restricting Chinese access to US technology, according to reports from the Wall Street Journal and Reuters.

“The Treasury Department is crafting rules that would block firms with at least 25 percent Chinese ownership from buying companies involved in what the White House calls ‘industrially significant technology,'” the Wall Street Journal says. A separate proposal would institute beefed-up export controls preventing Chinese companies from buying these technologies from US firms.

The policies could be announced as soon as this week, the Journal says.