The COVID-19 pandemic intensifies the competition between the US and China. The US emphasizes that it will invest more resources in the Indo-Pacific region to fight against the CCP's expansion of power, and the US will cooperate with regional partners to maintain stability over the Taiwan Strait. In response to the People's Liberation Army's aggressive behavior against Taiwan, the US could either continue to adopt either "strategic ambiguity," or shift toward "strategic clarity," which will affect the direction of Taiwan's strategic interests. This paper attempts to analyze the impact of the rising US-China competition in the Indo- Pacific region on the security of the Taiwan Strait and use the Russo-Ukrainian war as a lesson to explore the US's choice between "strategic ambiguity" and "strategic clarity." In addition, while thinking about the strategic cooperation between Taiwan and US, gradually restarting the dialogue with the CCP, the paper seeks a peaceful and stable atmosphere across the Strait and takes pro-US and stable China as the primary consideration for the external development pattern, so as to maintain the status quo of avoiding war.