Each side is making continuous efforts to adjust to the other's legitimate interests.

They agreed a year ago that they would return to a fourth round, but they have delayed the process for 13 months. So, we still need to see how North Korea can persuade us that in the future, it will honor its word.

North Korea is not going to give up its demand for a light-water reactor in this round and that it be discussed first, before disarming.

The timing is really interesting. China and Iran appear to be collaborating not only for energy development but also to increase the stakes in case sanctions are imposed. This is a subtle message that even if sanctions are passed, you could have limited sanctions without touching upon oil.

The more China possesses U.S. dollars, the more China can invest in the U.S. and buy U.S. bonds and U.S. products like Boeing aircraft.