Taiwan's opposition leader, a proponent of closer ties with Beijing, said on Wednesday she hoped to sow the "seeds of peace" during a rare visit to China.
Kuomintang (KMT) chairwoman Cheng Li-wun is the party's first leader to visit China in a decade but her trip -- during which she hopes to meet Chinese leader Xi Jinping -- has sparked debate in Taiwan.
Critics, including those within her own party which traditionally supports relations with China, have accused her of being too pro-Beijing.
China claims self-ruled Taiwan is part of its territory and has threatened to use force to seize it.
"I hope that today we plant the seeds of peace not only for Chinese people on both sides of the Strait, but for all humankind," Cheng said on Wednesday, in comments broadcast by Taiwanese media.
She spoke during a symbolic visit to the eastern city of Nanjing, where she visited the mausoleum of revolutionary leader Sun Yat-sen, one of the few Chinese historical figures revered in both Beijing and Taipei.
Beefed-up security at the mausoleum prevented foreigners from entering, AFP journalists saw.
China severed high-level contact with Taiwan in 2016 after Tsai Ing-wen of the Democratic Progressive Party won the presidency and rejected Beijing's claims to the island.
Cross-strait relations have worsened since then, with China ramping up military pressure with near daily deployments of fighter jets and warships near Taiwan and regular large-scale military drills.
However, Cheng said in a speech after her arrival on Tuesday evening that "the two sides of the Taiwan Strait are not doomed to war, as the international community has feared".
"Taiwan should not be reduced to a geopolitical pawn," she said in a Facebook post, in an apparent reference to tensions between China and the United States, Taiwan's main arms supplier.
Her visit, she added, would mark a "historic journey of peace".
In a park surrounding the mausoleum, 74-year-old Nanjing resident surnamed Fen told AFP on Wednesday that he had come to the area after hearing of Cheng's visit.
"I hope she will contribute to the reunification of the motherland," he said.
