China has said that President Tsai Ing-wen is pushing Taiwan into "stormy seas" after Beijing held military exercises in response to Ms Tsai's recent meeting with US House Speaker Kevin McCarthy in California.
Ms Tsai said the overseas trip, which included the meeting with Mr McCarthy and stops in Guatemala and Belize, showed the world Taiwan's determination to defend freedom and democracy.
The trip infuriated Beijing, prompting days of military drills designed to show it could forcefully retake control of the self-ruled island, which China claims as its own.
Taiwan's defence ministry said that China is planning to impose a no-fly zone north of the island which would fall into its air defence identification zone.
Taiwan's transport ministry said that after it protested, China has shortened the flight controls - originally planned to take place over three days - to less than half an hour on Sunday morning.
Chinese sources said the ban would disrupt Taiwan's northern flight information region and that the reason for the restrictions was unclear.
One senior official said the flight ban would affect 60%-70% of flights between northeast and southeast Asia, as well as flights between Taiwan and South Korea, Japan and North America.
China views Ms Tsai as a separatist and has rebuffed repeated calls from her for talks. She says she wants peace but that her government will defend Taiwan if it is attacked.
"Tsai Ing-wen brought danger to Taiwan. Tsai Ing-wen almost completely sided the United States, pushing Taiwan into stormy seas," China's Taiwan Affairs Office (TAO) spokesperson Zhu Fenglian said.
Ms Zhu said the drills around Taiwan were "a serious warning against the collusion and provocation of Taiwan independence separatist forces and external forces".
Ms Tsai, who returned to Taiwan a day before the drills began, said the trip had been a success in winning support against an aggressor that was threatening the island's freedom.
"Through this trip we again sent a message to the international community that Taiwan is determined to safeguard freedom and democracy which won acknowledgment and support from our democratic partners," Ms Tsai said as she met Canadian lawmakers at her office in Taipei.
"Faced with continued authoritarian expansionism it is even more critical for democracies to actively unite," she added.
"Canada is a very important democratic partner. We are willing to do our utmost to jointly safeguard the values of freedom and democracy with Canada and many more like-minded international partners."
Despite the tensions with China, Ms Tsai looked relaxed as she greeted the ten Canadian legislators, even cracking a joke.
Beijing has continued military activities around Taiwan, despite announcing the three days of drills had ended as scheduled on Monday.
The ministry said earlier today that in the previous 24 hours it had detected 35 Chinese military aircraft and eight navy vessels around Taiwan.
Of those aircraft, 14 had crossed the median line of the Taiwan Strait, according to a ministry-provided map; the line normally serves as an unofficial barrier between the two sides.
The aircraft crossing the median line included five Su-30 fighters at its northern end, with the other planes crossing at points in the centre and south.
Although Chinese fighters previously only occasionally crossed the median line, the country's air force has done so regularly since staging war games near Taiwan in August, after a visit to Taipei of then-US House speaker Nancy Pelosi.
China says it does not recognise the existence of the line.
Taiwan's government strongly rejects China's sovereignty claims and says only Taiwan's people can decide their future.
Taiwan ruling party picks VP William Lai as presidential candidate
Taiwan's ruling party has nominated Vice President William Lai as its candidate for next year's presidential elections, choosing a candidate who has been more outspoken on independence than incumbent Tsai Ing-wen.
"I am very honoured to have received the DPP's nomination to take part in the 2024 presidential election and to uphold the duty of safeguarding Taiwan," Mr Lai said at a Democratic Progressive Party press conference.
The 63-year-old has long been considered the frontrunner for the DPP nomination to succeed Ms Tsai, who cannot run again after her second four-year term ends in May 2024.
