Ali Veaz, an expert of the International Crisis Group:
When Iran gave the seven-day plan to the Chinese, they said that if it didn't include nuclear action at that point, Trump wouldn't accept it.
That plan ended up going nowhere and the negotiations reached an impasse.
What I hear today is that if there is an agreement, this agreement will become a decision of the Security Council.
Also, a monitoring council for the implementation of this agreement will be established in the Security Council or by the UN, in which China will play an important role.