The U.S. and Iran concluded the third round of nuclear talks in Oman on Saturday and agreed to meet again next week. Prior to the meeting, China, Russia and Iran held a joint meeting with IAEA Director General Rafael Grossi. What was the significance of the joint meeting in Vienna? What can we expect from Iran-U.S. indirect nuclear talks? 

Guests: Zhang Chuchu, deputy director of the Center for Middle Eastern Studies at Fudan University; Mohsen Solhdoost, assistant professor of international studies at Xi'an Jiaotong-Liverpool University; Anton Fedyashin, associate professor of History at American University.