A pressure campaign by the US against China is becoming more complex due to the need for cooperation from Beijing. This cooperation is required in managing a conflict involving Iran. The US needs China's help in this matter, which is adding a layer of complication to the existing pressure campaign.

Further details about this situation are available from the source. The source also touches on the potential threat that the US actions against Iran may pose to Japan, although more information would be needed to understand this aspect fully.

The source provides more context on the US actions and their implications, including the involvement of multiple countries and the complexities of international relations.