China has slapped further restrictions on Hsiao Bi-khim, Taiwan’s de facto ambassador to the United States, barring her and her family from entering the mainland, Hong Kong, and Macau, according to official media on Friday.

The penalties, released by China’s Taiwan Relations Office, also prohibit Hsiao-related investors and enterprises from collaborating with mainland organizations and persons.

These follow Taiwanese President Tsai Ing-meeting wen’s with US House Speaker Kevin McCarthy this week during a stopover in the US.

“Wow, the PRC (People’s Republic of China) just sanctioned me again, for the second time,” Hsiao tweeted in response to the announcement.

China’s Foreign Ministry also announced steps against the United States’ Hudson Institute and Reagan Library and their heads, saying both institutions provided a platform and facilities for what it called Tsai’s separatist activities.

Taiwan’s Foreign Ministry reacted angrily, saying China had no right to “butt in” when it came to Tsai’s overseas trips and that Beijing was “deceiving itself” if it thought the sanctions would have any effect.

“It not only deepens our people’s antipathy but exposes the irrational and absurd nature of the communist regime,” it said.

China considers Taiwan its own territory and not a separate country. Taiwan’s government disputes China’s claim.

The Chinese foreign ministry said it has immediately restricted universities, institutions, and other organisations and individuals in China from engaging and cooperating with the Hudson Institute and Reagan Library and their leaders.

China has also banned the leaders from entering the country, and frozen any of their properties in China, it said.

Neither body immediately responded to a request for comment.

Chinese sanctions will have little practical impact as senior Taiwanese officials do not visit China while Chinese courts do not have jurisdiction in Taiwan.

China imposed similar sanctions on The Prospect Foundation, which is headed by a former Taiwanese foreign minister, and the Council of Asian Liberals and Democrats, a multinational alliance that Taiwan’s ruling Democratic Progressive Party (DPP) co-founded in 1993.

China’s Taiwan Affairs Office accused the institutions of promoting the idea of “Taiwan independence” internationally.

Last August, after then-U.S. House Speaker Nancy Pelosi visited Taiwan, China imposed sanctions including an entry ban on seven Taiwanese officials and lawmakers including Hsiao whom it accused of being “independence diehards”, drawing condemnation from the democratically governed island.

Others on the August sanctions list include Taiwan Foreign Minister Joseph Wu, Wellington Koo, Secretary-General of Taiwan’s National Security Council, and DPP politicians.

DPP lawmaker Chao Tien-lin told reporters at parliament the sanctions on Hsiao were “absurd”.

“This will have no impact on her,” he said.