This isn't new news. China doesn't see the western/Israeli demand for the exchange to happen outside of Iran to be rational or reasonable in any way. China will be making the exchange with Iran in exchange for preferred oil trading treatment. Iran will then make this whole exchange thing backfire in the faces of the west and Israel, as they complete everything that is required of them and still the braying will continue. Iran is playing chess, Israel is playing checkers.
Jordan foreign minister says to speak with Kerry on Israel-Palestinian conflict (Reuters)
from the article: Iran: We're ready for uranium exchange with 'fresh' countries