In a bold move that could escalate global tensions, the United States has announced an expansion of economic sanctions against Iran and its trading partners, including China. The new measures were announced by US Treasury Secretary Janet Yellen on Monday, warning nations that financially partner with Iran would face isolation. China, the largest buyer of Iranian oil, has vowed to protect its interests and safeguard its rights in response to these sanctions, which it deems as "illegal unilateral measures." The US claims these sanctions are part of 'Operation Economic Outcast', an unprecedented financial offensive against Iran, aiming to end the Iranian threat. However, analysts doubt the direct impact of these sanctions on Iran's energy revenues, given China's historical disregard for US sanctions and its crucial role in global rare earth and mineral supply chains. The announcement comes ahead of planned talks between US President Donald Trump and Chinese President Xi Jinping next month, potentially adding a complex layer to their discussions. The ongoing Iran conflict, which has led to hikes in oil prices worldwide, remains unresolved despite recent diplomatic efforts.