被问“中美谁先打电话时”，美财长紧张到结巴

Core Viewpoint - The article discusses the recent comments made by U.S. Treasury Secretary Janet Yellen regarding the high-level economic talks between the U.S. and China, highlighting the ambiguity in her response about who initiated the communication [1] Group 1 - U.S. Treasury Secretary Yellen's interview on May 6 addressed the ongoing economic discussions with China [1] - Yellen avoided directly answering the question of who made the first call, indicating a lack of clarity in the communication process [1]