WASHINGTON:US President Donald Trump on Thursday unveiled sweeping bans on US transactions with China's ByteDance, owner of video-sharing app TikTok, and Tencent, operator of messenger app WeChat, in a major escalation of tensions with Beijing.

The executive orders, which go into effect in 45 days, come after the Trump administration said this week it was stepping up efforts to purge "untrusted" Chinese apps from US digital networks and called TikTok and WeChat "significant threats."

The hugely popular Tiktok has come under fire from US lawmakers and the administration over national security concerns surrounding data collection, amid growing distrust between Washington and Beijing.

On Wednesday, US Secretary of State Mike Pompeo expanded efforts on a program dubbed "Clean Network" to prevent various Chinese apps as well as Chinese telecoms firms from accessing sensitive information on US citizens and businesses.

James Lewis, a technology expert with Washington-based think tank Center for Strategic and International Studies, said the orders appeared coordinated with Pompeo's announcement.

"This is the rupture in the digital world between the US and China," he said.

"Absolutely, China will retaliate."

"On TikTok, Trump is clearly putting pressure on Bytedance to close the deal," Lewis said.

TikTok has 100 million users in the United States. While WeChat is not popular in the country, the app, which has over 1 billion users, is ubiquitous in China.

It is also widely used by expat Chinese as a main platform for communications with family and friends as well as a medium for various other services such as games and e-commerce.

WeChat and TikTok were among 59 mostly Chinese apps outlawed in India in June for threatening the country's "sovereignty and integrity."

Operator Tencent is China's second most-valuable company after Alibaba at $686 billion. It is also China's biggest video game company and earlier this summer opened California-based studio.

Its shares fell nearly 10% in Hong Kong after Trump's order. The yuan, which is sensitive to Sino-U.S. relations, lost 0.4%.

Tencent and ByteDance declined to comment.


SWEEPING POWER

Trump issued the orders under the International Emergency Economic Powers Act, a law that grants the administration sweeping power to bar U.S. firms or citizens from trading or conducting financial transactions with sanctioned parties.

US Commerce Secretary Wilbur Ross will identify transactions covered by the prohibition after the orders take effect in mid-September.

The development comes soon after the US ordered China to vacate its consulate in Houston, Texas, followed by China's order requiring the United States to vacate its consulate in the southwestern city of Chengdu.

But tension has been simmering between the two powers for months, with the United States taking issue with China's handling of the novel coronavirus outbreak and moves to curb freedoms in Hong Kong.

Trump said this week he would support the sale of TikTok's US operations to Microsoft Corp if the US government got a "substantial portion" of the sales price.

He nevertheless said he will ban the service in the United States on Sept 15, though some Republicans have raised concerns about the political fallout of banning the popular app.

The app may be used for disinformation campaigns that benefit the Chinese Communist Party, and the United States "must take aggressive action against the owners of TikTok to protect our national security," Trump said in one order.

In the other, Trump said WeChat "automatically captures vast swaths of information from its users. This data collection threatens to allow the Chinese Communist Party access to Americans' personal and proprietary information."

The order would effectively ban WeChat in the United States in 45 days by barring "to the extent permitted under applicable law, any transaction that is related to WeChat by any person, or with respect to any property, subject to the jurisdiction of the United States, with Tencent Holdings Ltd."

Late on Thursday some China watchers in Washington were already questioning the logic behind the orders.

The order "calls TikTok a national security threat," said Derek Scissors, an expert on Sino-U.S. economic relations at the American Enterprise Institute think tank.

"Either we've missed the threat for three years or it just became one and yet we are waiting 45 days."