Negotiations between Iran and the United States over Tehran’s rapidly advancing nuclear program will move Wednesday to what’s known as the “expert level” — a sign analysts say shows that the talks are moving forward rapidly.

Visit at behest of Chinese side comes as Tehran and Washington continue direct and indirect talks focused on Iran’s nuclear program - Anadolu Ajansı

A second round of high-level talks between US and Iranian delegations on Tehran’s nuclear program has concluded in Rome on Saturday, amid tempered optimism about a diplomatic way forward.