Donald Trump on Friday afternoon extended by 75 days a deadline for the Chinese technology company ByteDance to sell US assets of the popular short-video app TikTok to a non-Chinese buyer or face a ban that was supposed to take effect in January under a 2024 law.

“The deal requires more work to ensure all necessary approvals are signed,” the US president said, explaining why he was extending the deadline he set in January that was supposed to expire on Saturday. “We hope to continue working in good faith with China, who I understand is not very happy about our reciprocal tariffs.”

China now faces a 54% tariff on goods imported into the US. Trump has said he would be willing to reduce tariffs on China to get a deal done with ByteDance.

Trump has said his administration was in touch with four groups about a prospective TikTok deal. He has not identified them.

“We do not want TikTok to ‘go dark,’” Trump added.

The White House-led talks on the future of TikTok, which is used by about half of all Americans, are coalescing around a plan for the biggest non-Chinese investors in parent company ByteDance to increase their stakes and acquire the app’s US operations, Reuters has reported.

The plan entails spinning off a US entity for TikTok and diluting Chinese ownership in the new business to below the 20% threshold required by US law, rescuing the app from a looming US ban, sources have told Reuters.

Jeff Yass’s Susquehanna International Group and Bill Ford’s General Atlantic, both of which are represented on ByteDance’s board, are leading discussions with the White House.

Walmart is also considering joining a group of investors in a deal for TikTok, an ABC News reporter said on social media. The big retailer, which had expressed an interest in investing in TikTok in 2020, did not immediately respond to a Reuters’ request for comment.

The biggest stumbling block for any deal for TikTok’s US business is Chinese government approval, with Beijing yet to comment.

TikTok did not immediately respond to a request for comment.