"Taiwan has been an integral part of China since ancient times. It never was, is not, and never will be a country," Chinese Foreign Minister Wang Yi said on Sunday.

Wang, also a member of the Political Bureau of the Communist Party of China Central Committee, made the remarks at a press conference on foreign policy held on the sidelines of the fourth session of the 14th National People's Congress in Beijing.

Wang noted that Taiwan's return to China is an outcome of victory of the Chinese People's War of Resistance Against Japanese Aggression and of the World War II.

A series of international legal documents – including the Cairo Declaration, the Potsdam Proclamation, the Japanese Instrument of Surrender and United Nations General Assembly Resolution 2758 – have all confirmed Taiwan's status as an integral part of China, Wang pointed out, adding that any attempt to  establish "two Chinas" or "one China, one Taiwan" in the international arena is doomed to fail.

Wang also said that the Democratic Progressive Party (DPP) authorities' stubborn adherence to the separatist stance of "Taiwan independence" is the root cause undermining peace and stability across the Taiwan Strait.

"The more the international community stands against 'Taiwan independence' and upholds the one-China principle, the more assured peace and stability will be across the Taiwan Strait," he said.

Wang reiterated that the Taiwan question is China's internal affair and lies at the very core of the country's core interests, warning that this red line must not be crossed.

"Taiwan was recovered by China over 80 years ago, and we will never allow any individual or force to separate it from China again," he said.

According to Wang, the one-China principle enjoys overwhelming support in the international community. More and more countries, he said, have reaffirmed their adherence to the one-China principle, recognized Taiwan as part of China's territory and expressed opposition to any form of "Taiwan independence."

Opposing "Taiwan independence" and promoting China's reunification is the trend of the times and meets the expectation of the international community, he added.

Wang made it clear that the historic process of resolving the Taiwan question and achieving China's complete reunification is unstoppable.