Taiwanese President Tsai Ing-wen said Sunday that the self-governing island’s democracy remains under direct threat from rival China, underscoring her calls for closer ties with the US and other allies.

Tsai was speaking at a televised debate against Han Kuo-yu of the main opposition Nationalist Party and veteran politician James Soong of the People’s First Party. Elections for president and the legislature are set for January 11. Most polls show Tsai leading in her quest for a second four-year term.

Tsai said she would preserve Taiwan’s freedoms and way of life, but would make no changes to the constitution or the island’s official name, the Republic of China, which moved its seat of government to Taipei, the island’s capital, following the Communist Party’s seizure of power on mainland China in 1949.

“Taiwan’s most pressing challenge arises from China’s expanding ambitions,” Tsai said. “The situation in our region is ever-more complex and Taiwan’s sovereignty it’s free, democratic way of life is under threat of being stripped away and undermined.”

currently holds a majority in the assembly, allowing her to pursue an agenda of economic reforms, partly intended to attract reinvestment from Taiwanese business groups based in China and elsewhere.

During the debate, Han furthered his claims of facing opposition from the mainstream media and accused Tsai’s backers of corruption. He described China’s threat to use military force to bring Taiwan under its control as an abstraction and defended his previous dealings with Chinese authorities as necessary to ensure Taiwan’s economic future.