BEIJING -- Taiwan's participation in activities held by international organizations should be based on the one-China principle, a spokesman from the Chinese mainland said at a press conference Wednesday.

An Fengshan, spokesman for the Taiwan Affairs Office of the State Council, was responding to a question on Taiwan during the regular session of the United Nations General Assembly.

An reiterated that the mainland's major policies towards Taiwan remain unchanged.

"We will continue to adhere to the '1992 Consensus' which embodies the one-China principle, ensure the common political foundation for peaceful development of cross-Strait relations, oppose 'Taiwan independence' and protect our sovereignty and territorial integrity," An said.

Concerning Taiwan's participation in the Asia-Pacific Economic Cooperation (APEC) summit to be held in Vietnam in November, An said it should be handled in accordance with the one-China principle and the memorandum of understanding among members of the APEC.

Only by upholding the one-China principle can cross-Strait relations return to the path of peaceful development to the benefit of compatriots across the Taiwan Strait, An said.

Regarding concerns that Taiwan will develop nuclear weapons, An said he has not identified the source of the information, stressing that the mainland is firmly opposed to such ideas.

Responding to a question on the United States' plan to resupply its warships off the coast of Taiwan from 2018, An said that "we resolutely oppose any official contact and military links between the US and Taiwan."

The spokesman added that various activities will be held to mark the 30th anniversary of cross-Strait exchanges.