Expert: There are both similarities and differences between Iran's negotiations with the United States and Europe.

Professor Niu Xinchun from the China-Arab Research Institute at Ningxia University: Iran is currently negotiating with three European countries on the nuclear issue, and previously they also had negotiations with the United States on the nuclear issue. There are differences and connections between these two negotiations. The negotiations with the three European countries are mainly aimed at resolving the issue of United Nations sanctions on Iran, while the negotiations with the United States are mainly aimed at resolving the issue of US sanctions on Iran. The two negotiations are also connected - whether it is the three European countries or the United States, they all want to restrict Iran's nuclear capabilities.