The United States has announced plans to broaden economic sanctions against Iran and its trading partners, including China, which is the largest buyer of Iranian oil. In response, China's foreign ministry spokesman, Lin Jian, stated that China is firmly opposed to what it considers "illegal unilateral sanctions" and will take "all necessary measures" to safeguard its rights. This announcement comes after US Treasury Secretary Janet Yellen announced the new measures on Monday, warning nations that financially partner with Iran would be isolated. The new sanctions, described by the US as "Operation Economic Outcast," are aimed at putting economic pressure on Iran and are an extension of the ongoing conflict between the two countries, which has led to hikes in oil prices worldwide. The planned talks between US President Donald Trump and Chinese President Xi Jinping next month could potentially be a point of contention, as China processes the majority of the world's rare earths and other critical minerals necessary for high-tech manufacturing. Iranian Economy Minister Ali Madanizadeh has stated that Tehran is "fully prepared" for the wider sanctions and has a two-year plan to manage these events. However, analysts have expressed doubt about the effectiveness of the new measures, with David Oxley of Capital Economics telling the BBC that the direct impact on Iran's energy revenues would be limited due to China's continued trade relations with Iran.