拜登在2021年1月就任總統，雖然外交與國安人事多為歐巴馬時期的官員，卻延續了川普的「抗中保台」政策；習近平一開始對拜登是採取「和戰兩手」策略，但拜登不甘示弱，除派親信訪台外也發表挺台言論，讓中國十分不滿；而美國從阿富汗撤軍雖引發外界質疑，卻反而凸顯台灣的重要性。其次，在美國的公開支持下我國於立陶宛成立「台灣代表處」，是第二個以台灣為名的駐外單位，雖然中國強烈反對但立陶宛並未退縮，此成為台灣外交的新模式；而美國更協助台灣鞏固邦交國。第三，美國聯合日本推動「抗中保台」政策，日本高層官員則高度憂慮中國對台灣的侵擾，也將中國視為日本最大的武力威脅，強調台日是「唇亡齒寒」的關係。

Joe Biden took office as President of the U.S. in January 2021. Although many of his diplomatic and national security personnel were from the Obama administration, he continued Trump's "anti-China, pro-Taiwan" policy. Initially, Xi Jinping adopted a "peaceful coexistence and war preparedness" strategy towards Biden. However, Biden was reluctant to show weakness. Besides sending his trusted officials to visit Taiwan, he also made statements in support of Taiwan, which made China discontented. Although the U.S. withdrawal from Afghanistan raised doubts from the international community, it indeed highlighted Taiwan's importance. Furthermore, with the public support of the U.S., Taiwan established the "Taiwan Representative Office" in Lithuania, which is the second overseas official unit using Taiwan's name. Although China strongly objected, Lithuania did not back down, and this became a new model for Taiwan's diplomacy. The U.S. also assisted Taiwan in consolidating diplomatic relations with other countries. Third, the U.S. united with Japan to promote the "anti-China, pro-Taiwan" policy. High-level Japanese officials were highly concerned about China's aggression towards Taiwan, and viewed China as Japan's main military threat, emphasizing that Taiwan and Japan have an interdependent relationship.