Trump said this month the United States was in talks with four groups interested in acquiring TikTok, with the app facing an uncertain future in the country.

A US law has ordered TikTok to divest from its Chinese owner ByteDance or be banned in the United States, enacted over concerns that Beijing could exploit the video-sharing platform to spy on Americans or covertly influence US public opinion.

The law took effect on January 19, a day before Trump's inauguration, but he quickly announced a delay that has allowed it to continue to operate.

That delay is set to expire on April 5.

Trump told reporters at the White House on Wednesday that he could give China "a little reduction in tariffs or something to get it done".

"We're going to have a form of a deal," Trump said, adding that if it wasn't done in time, he would extend the deadline.

"China is going to have to play a role in that, possibly in the form of an approval and I think they'll do that."

Beijing swiftly rebuffed Trump's suggestion, with its foreign ministry saying that it has "repeatedly stated our position" on TikTok.

"The Chinese side's stance against imposing additional tariffs is also consistent and clear," foreign ministry spokesman Guo Jiakun said.

- 'People's Bid for TikTok' -

Trump similarly attempted to ban TikTok in the United States on national security concerns during his first stint in the White House.

TikTok temporarily shut down in the United States in January and disappeared from app stores as the deadline for the law approached, to the dismay of millions of users.

Trump suspended its implementation for two-and-a-half months after beginning his second term on January 20, seeking a solution with Beijing.

TikTok subsequently restored service in the United States and returned to the Apple and Google app stores in February.

Artificial intelligence (AI) startup Perplexity recently expressed its interest in buying TikTok.

Perplexity laid out in a blog post a vision for integrating its AI-powered internet search capabilities with the popular video-snippet sharing app.

"Combining Perplexity's answer engine with TikTok's extensive video library would allow us to build the best search experience in the world," the San Francisco-based firm said.

Although TikTok does not appear overly motivated regarding the sale of the app, potential buyers include an initiative called "The People's Bid for TikTok", launched by real estate and sports tycoon Frank McCourt's Project Liberty initiative.

Others in the running are Microsoft, Oracle and a group that includes Internet personality MrBeast, whose real name is Jimmy Donaldson.

"Any acquisition by a consortium of investors could in effect keep ByteDance in control of the algorithm, while any acquisition by a competitor would likely create a monopoly in the short form video and information space," Perplexity said in its post.

"All of society benefits when content feeds are liberated from the manipulations of foreign governments and globalist monopolists."