美方宣布对华加征关税等限制措施，商务部回应！

Group 1 - The core viewpoint of the article emphasizes China's stance on trade relations with the U.S., asserting that China is open to dialogue but will respond firmly to threats and restrictions [2][3] - China has clarified its position regarding the U.S. threats of imposing 100% tariffs and highlighted that its export control measures on rare earths are legitimate actions to safeguard national security [2] - The article mentions that China has communicated its export control measures to the U.S. through bilateral dialogue mechanisms before their implementation [2] Group 2 - The article reiterates that both countries have significant common interests and potential for cooperation, suggesting that mutual benefits can be achieved through respectful and equal negotiations [3] - It criticizes the U.S. for its inconsistent approach of seeking dialogue while simultaneously threatening new restrictions, urging the U.S. to correct its actions and engage sincerely in discussions [3] - The article calls for maintaining the achievements of previous negotiations and emphasizes the importance of managing differences through dialogue to promote a healthy and stable development of Sino-U.S. economic relations [3]