BEIJING, May 19 -- There is no space for ambiguity in the nature of cross-Strait relations, a Chinese mainland spokesperson said Friday.

Major changes have occurred to cross-Strait situation in the past year, resulting in increasing tensions in cross-Strait relations, the loss of past achievements in peaceful development of cross-Strait relations and damages to the interests of compatriots on both sides of the Taiwan Strait, due to Taiwan authorities' refusal to accept the 1992 Consensus, which embodies the one-China principle, said An Fengshan, spokesperson for the Taiwan Affairs Office of the State Council.

By refusing to endorse the 1992 Consensus, the Democratic Progressive Party (DPP) has undermined the common political foundation for the peaceful development of cross-Strait relations.

If the political foundation is damaged, cross-Strait relations will return to the old path of uncertainty and turmoil, An said.

The fact that the Chinese mainland and Taiwan belong to one China shall not be changed, the principle of one China that is universally upheld by the international community shall not be challenged, he said.

"We will unswervingly stick to the one-China principle and uphold the 1992 Consensus. We will not tolerate any attempt to separate Taiwan from China," An said.

Chinese people on both sides of the Strait should stand shoulder-to-shoulder to safeguard the foundation of cross-Strait relations, contain "Taiwan independence" forces and endeavor to realize the great revival of the Chinese nation, An said.