Xinhua News Agency, Washington, October 26 (Reporter Liu Pinran) The US President’s National Security Affairs Assistant Sullivan said on the 26th that the United States believes that the Iranian nuclear issue still has a chance to be resolved through diplomatic channels, but the negotiation window is not “infinite”.

  Sullivan said at the White House press conference that day that the United States is paying close attention to the progress of Iran's nuclear program. The first task of the United States is to restart the Iranian nuclear negotiations and return to the comprehensive agreement on the Iranian nuclear issue.

U.S. President Biden will discuss the Iranian nuclear issue with European leaders during the G20 summit in Rome at the end of this month, and form a "united front" on Iran's policy.

  Sullivan stated that the message the United States will send to Iran is that the negotiation window is not "infinite."

The United States needs to see the diplomatic negotiations resume and progress, while retaining other policy options, which can be used to deal with the Iranian nuclear issue when necessary.

He said that the United States believes that the Iranian nuclear issue still has a chance to be resolved through diplomatic channels.

  The US special envoy for Iran, Robert Marley, told the media on the 25th that efforts to resume the implementation of the Iran nuclear agreement are at a "critical stage" and the window for negotiations will not be open forever.

He said that this is a technical issue rather than a time issue, because the progress Iran has made on its nuclear program will be irreversible at some point.

  Iran’s Deputy Foreign Minister Bagheri said on the 25th that Iran is determined to continue participating in the Iranian nuclear negotiations, but the negotiations should “fully and effectively” lift the illegal sanctions against Iran.

The U.S. policy of extreme pressure on Iran will not help remove obstacles to negotiations, but will make the negotiations more complicated.

  In July 2015, Iran reached an Iran nuclear agreement with the United States, Britain, France, Russia, China and Germany.

In May 2018, the US government unilaterally withdrew from the Iran nuclear agreement, and subsequently restarted and added a series of sanctions against Iran.

Since May 2019, Iran has gradually suspended the implementation of certain provisions of the Iran nuclear agreement, but promised that the measures taken are "reversible."

  The talks between the relevant parties to the Iranian nuclear agreement began in April this year in Vienna, the capital of Austria, to discuss the issue of the United States and Iran to resume the implementation of the agreement. Six rounds have been held so far.

Due to serious differences between the United States and Iran and the change of leadership of the Iranian government, a new round of talks has not been held for a long time.