Moscow considers it possible to preserve the Iran nuclear deal with sufficient political will of its participants and despite the US' withdrawal.
Iran's government has also announced that it will stay committed to the nuclear deal if Europe, China and Russian Federation abide by it.
Foreign ministers from the U.K., France and Germany are due to sit down with their Iranian counterpart, Javad Zarif, in Brussels on Tuesday to discuss how to move forward. "But if we want to stay in this agreement and ensure that Iran stays in this agreement and abides to the terms of the agreement, then we need to talk about this", German Foreign Minister Heiko Maas said.
After their meeting, Zarif and Wang hailed the "comprehensive strategic partnership" between their countries, with the Chinese minister saying: "I hope and believe that these visits to multiple countries will ... help protect Iran's legitimate national interests and peace and stability in the region". "We're not there, we're beginning the process", Zarif told reporters after the talks.
But preserving or increasing European investment in Iran in the face of the American sanctions is a hard challenge - especially since the White House has made clear to Europeans that their companies will not get exemptions from the sanctions, which Washington hopes will pressure Iran into a new set of negotiations.
"We have started an intensive process [and] the economic benefits inside the JCPOA should be preserved for Iran", Zarif said.
Their efforts focus on nine key areas including maintaining economic ties with Iran, continuing Iran's ability to sell oil and gas products and protecting European Union companies doing business in Iran.
It is unclear how well the measure could be enforced, given that big multinationals are likely to be doing more business in the US than they are in Iran and may be unwilling to compromise that market access.
The European Union insists the deal is working, pointing to repeated United Nations inspections verifying the Islamic republic's compliance with its side of the bargain.
If you look at the enhancement of Iran's strategic position in Iraq, in Syria, in Lebanon, the arc of control that they're seeking to construct with conventional forces all the way from Iran to the Mediterranean, if you look at what they're doing in Yemen to support the Houthi rebels, to gain a position of control there behind the lines, in effect, of Saudi Arabia and the other oil-producing monarchies, they have used the obsession with the nuclear deal to continue to expand and threaten dominance throughout the Middle East.
The EU has said it will stick to the deal as long as Iran does, but the Islamic republic has warned it is ready to resume "industrial-scale" uranium enrichment if it is not satisfied.
More than €143 million worth of Irish exports to Iran are under threat from USA president Donald Trump's decision to pull out of the global nuclear deal and to reimpose sanctions on the Islamic state.
German exports to Iran totalled almost 3.0 billion euros in 2017, while French exports soared from 562 million euros in 2015 to 1.5 billion in 2017 and oil giant Total has pledged to invest some $5 billion in the South Pars gas field.
For Iran, it will mean crushing sanctions and direct or continued indirect war declared by Israel and Saudi Arabia with US support.
British Foreign Secretary Boris Johnson said before the meeting in Brussels that "the United Kingdom and our European partners continue to view the nuclear deal as vital for our shared security, and remain fully committed to upholding it".
Germany, France and Britain were three of the six signatories to the 2015 pact, which saw sanctions lifted in return for the commitment by Tehran not to acquire nuclear weapons.