Beijing warned that it was vehemently opposed to the reported meeting between President Tsai Ing-wen and US House Speaker Kevin McCarthy during a scheduled stopover in California.
Taiwan's President Tsai Ing-wen has arrived in New York for a visit that has triggered threats of reprisal by China if she meets with House speaker Kevin McCarthy - and US warnings for Beijing not to overreact.
Tsai is stopping over in the United States en route to Central America, where she will meet with the leaders of Guatemala and Belize to shore up ties with those diplomatic allies.
On her way back to Taiwan she will stop in California, where McCarthy had said he would meet her.
China claims the democratic island as part of its territory to be retaken one day and, under its "One China" principle, no country may maintain official ties with both Beijing and Taipei.
Beijing warned that it was vehemently opposed to any meeting between Tsai and McCarthy and vowed to take "resolute measures to fight back" if it goes ahead.
The United States responded by saying China should not use Tsai's stopover as a pretext to act aggressively around the Taiwan Strait.
'Playing with fire'
Tsai was seen arriving at her hotel in New York, where dozens of pro-Beijing demonstrators waving China's red flag gathered boisterously while nearby a similarly sized group of pro-Taiwan people cheered and waved their banner and the US stars and stripes.
Xu Xueyuan, the charge d'affaires at the Chinese embassy in Washington, said she had spoken directly to US officials numerous times and warned them that Tsai's trip would violate China's core interests.
"We urge the US side not to repeat playing with fire on the Taiwan question," she told reporters, alluding among other things to last year's visit to Taiwan by then House speaker Nancy Pelosi.
Tsai's trip follows Honduras's decision this month to open diplomatic relations with Beijing, leaving Belize and Guatemala among just 13 countries that have official ties with Taipei.
After first visiting New York, Tsai will meet her Guatemalan counterpart Alejandro Giammattei and Belize Prime Minister John Briceno in their respective countries, her office said.
READ MORE: Taiwan president heads to US, Central America amid China's threats
Honduras President Xiomara Castro will travel to China "soon", the Central American country says, days after it snapped relations with Taiwan and established formal diplomatic ties with China pic.twitter.com/rHLlPT6nVO— TRT World Now (@TRTWorldNow) March 29, 2023
China has increased investment in Latin America, a key diplomatic battleground between Taipei and Beijing since the two sides split in 1949 after a civil war.
Taiwan accused China on Sunday of using "coercion and intimidation" to lure away its allies after Honduran Foreign Minister Enrique Reina and his Chinese counterpart Qin Gang officially launched relations in Beijing.
During the meeting, Qin formally invited Honduran President Xiomara Castro to visit China "at an early date."
One of the poorest nations in the region, Honduras made the flip from Taiwan to Beijing out of economic necessity, Reina had said earlier.
The move continued a trend in Latin America, with Nicaragua, El Salvador, Panama, the Dominican Republic and Costa Rica all switching diplomatic recognition to Beijing in recent years.
In addition to Guatemala and Belize, Taiwan still has official ties with a handful of countries in Latin America and the Caribbean, including Paraguay and Haiti.
READ MORE: Honduras breaks diplomatic ties with Taiwan in favour of China