BEIJING, May 14 (Xinhua) -- China will continue playing a constructive role in nuclear talks with Iran, as the latest international negotiations on finalizing an accord on the matter take place in Vienna, a Foreign Ministry spokesperson vowed on Thursday.

Cheng Jingye, China's envoy to the International Atomic Energy Agency, will attend the negotiations, Hua Chunying announced at a regular news briefing.

Iran and the P5+1 -- China, France, Russia, Britain and the United States, plus Germany -- have held several rounds of talks on a comprehensive nuclear accord since 2008.

The talks resumed in Vienna on Thursday between the EU and Iran, and the P5+1 is set to join the talks on Friday.

The talks have already entered a stage of negotiating on the text, according to Hua.

She called on all the parties involved to seize the opportunity, preserve political composure and accommodate each other's concerns so that the talks can achieve substantial progress.

China will continue to participate in the talks and work with the other parties to facilitate a fair, balanced and mutually beneficial accord, the spokesperson said.

Iran's nuclear program has long been a subject of concern for Western powers, who believe it to be geared towards developing nuclear weapons. Iran insists it has an inalienable right to develop its civilian atomic plan.