People take pictures of a Taiwan Air Force Mirage 2000-5 aircraft landing at Hsinchu Air Base in Hsinchu, Taiwan, on Sunday. Reuters

Nancy Pelosi's visit last week to the self-ruled island infuriated China, which responded with test launches of ballistic missiles over the island's capital for the first time and the cutting of communication links with the United States.

Those exercises were supposed to end on Sunday, but neither Beijing nor Taipei confirmed their conclusion. But a late-evening commentator on Chinese state television said the Chinese military would now conduct "regular" drills on the Taiwan side of the line, saying the "historic task" of China's "reunification" could be realised.

Taiwanese naval frigate Lan Yang is seen from the deck of a Chinese ship during military exercises on Friday. AP

"For information about another country's military exercises we suggest you please ask the country conducting them to explain," a Taiwan defence ministry official told reporters in a text message.

China's defence ministry did not respond to a request for comment about the expected conclusion of the drills on Sunday.

Taiwan's transport ministry said six of the seven "temporary danger zones" China had warned airlines to avoid ceased to be in effect as of noon on Sunday, signalling a partial drawdown of the drills.

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Some 10 warships each from China and Taiwan sailed at close quarters in the Taiwan Strait, with some Chinese vessels crossing the median line, an unofficial buffer separating the two sides, according to a person with knowledge of the matter.

The island's defence ministry said in a release multiple Chinese military ships, aircraft, and drones were simulating attacks on the island and its navy. It said it had sent aircraft and ships to react "appropriately".

Nancy Pelosi attends a meeting with Tsai Ing-wen at the presidential office in Taipei on Wednesday.

As Chinese forces "pressed" the line, as they did on Saturday, the Taiwan side stayed close to monitor and, where possible, deny the Chinese the ability to cross, the person said.

"The two sides are showing restraint, the person said, describing the manoeuvres as high seas "cat and mouse".

"One side tries to cross, and the other stands in the way and forces them to a more disadvantaged position and eventually return to the other side."

A Taiwan Navy soldier monitors the waters of Taiwan in response to the military exercises by PLA. Reuters

Taiwan said its shore-based anti-ship missiles and its Patriot surface -to-air-missiles were on stand-by.

The Chinese exercises, centred on six locations around the island that China claims as its own, began on Thursday and are scheduled to last until midday on Sunday, the official Xinhua News Agency reported last week.

China's military said on Saturday the sea and air joint exercises, north, southwest and east of Taiwan, had a focus on land-strike and sea-assault capabilities.

The United States called the exercises an escalation.

Taiwan Navy soldiers rehearse a missile loading operation in response to the military exercises by PLA. Reuters

"These activities are a significant escalation in China's efforts to change the status quo. They are provocative, irresponsible and raise the risk of miscalculation," a White House spokesperson said.

"They are also at odds with our long-standing goal of maintaining peace and stability across the Taiwan Strait, which is what the world expects."

Taiwan said its shore-based anti-ship missiles and its Patriot surface-to-air-missiles were on stand-by.

Speaking during a visit to Bangladesh, Chinese Foreign Minister Wang Yi said his country's actions were "legitimate, reasonable, in accordance with the law," and aimed at protecting China's "sacred sovereignty."

"It must be borne in mind that Taiwan is not a part of the United States — it is China's territory," Wang's ministry cited him as saying.

LIFTING RESTRICTIONS

The Chinese exercises, centred on six locations around the island, began on Thursday and were scheduled to last until midday on Sunday, the official Xinhua News Agency reported last week.

There was no announcement from China on Sunday on whether the exercises had ended and Taiwan said it was unable to verify whether China had stopped them as scheduled.

Nevertheless, Taiwan's transport ministry it was gradually lifting restrictions on flights through its airspace, saying notifications for the drills were no longer in effect.

But it added that Taiwan would continue to direct flights and ships away from one of the drill zones off its east coast until Monday morning.

China's military has said the sea and air joint exercises, north, southwest and east of Taiwan, had a focus on land-strike and sea-assault capabilities.

The United States called the exercises a significant escalation in China's efforts to change the status quo.

"They are provocative, irresponsible and raise the risk of miscalculation," a White House spokesperson said. "They are also at odds with our long-standing goal of maintaining peace and stability across the Taiwan Strait."

'POLITICAL STUNT'

China says its relations with Taiwan are an internal matter and it reserves the right to bring the island under its control, by force if necessary. Taiwan rejects China's claim, saying only Taiwan's people can decide their future.

China has warned the United States not to "act rashly" and create a greater crisis and the state-run Xinhua News Agency said in a commentary that Pelosi had staged a "political stunt" out of self-interest.

"Insisting on going to the island, she apparently does not care about harming China-U.S. ties, or putting peace across the Taiwan Strait on the line," it said.

Pelosi, a long-time China critic and a political ally of President Joe Biden, arrived in Taiwan late on Tuesday on the highest-level visit to the island by an American official in decades, despite Chinese warnings. She said her visit showed unwavering US commitment to supporting Taiwan's democracy.

Speaking at a news conference in Japan on Friday, Pelosi said her trip to Asia was "not about changing the status quo in Taiwan or the region."

Taiwan's foreign ministry condemned China's "aggressive and provocative" exercises and urged it "to immediately stop such tension-escalating behaviours that have endangered the common good of the region and the world".

As part of its response to Pelosi's visit, China has halted dialogue with the United States in a series of areas including contacts between theatre-level military commanders and on climate change.

Reuters