VIENNA, July 2 -- In resolving outstanding Iran's nuclear issue, the Chinese side continues to play a constructive part, Chinese Foreign Minster Wang Yi said here on Thursday.

"I'll join my foreign minister colleagues in detail discussions about this issue. Hopefully consensus can be reached among the parties concerned," said Wang after arriving in Vienna on Thursday.

All parties concerned need to work together to uphold international non-proliferation regime, to help deliver a solution to this long-standing Iranian nuclear issue, and to make positive efforts to help uphold peace in the Middle-East region, he said.

Wang also told reporters that the Chinese delegation come with wisdom to push the talks forward.

"We have confidence that finally the parties concerned will arrive at a fair, balanced and just solution," he said.

There is "high possibility" of reaching a deal by the July 7 deadline, Wang said in response to a reporter's question.

As U.S. State Department deputy spokeswoman Marie Harf announced on Tuesday, the deadline in Iran nuclear talks was extended from June 30 to July 7.

Iran and five United Nations Security Council permanent members plus Germany have been negotiating over the past 16 months to reach a long-term deal over Tehran's disputed atomic plan. During the period, Iran would suspend some sensitive nuclear activities, and in return, western states would partially relieve some sanctions imposed on Tehran.