Currently, there are two security system in the East Asia; one is the economic security system guided by China, and the other is the military security system dominated by the United States. However, after the end of the COVID-19 pandemic, will this "dual-track and binary security system (DTBS system)" continue in the region? This article argues that the continuation of this unique regional order depends on the strategic concerns of both Washington and Beijing. Moreover, the preference of most countries in East Asia is to maintain the DTBS system, and they do not want to take an inflexible position between the US and China at the same time. In this case, both the US and China would avoid becoming actors undermining the DTBS system. The only exception is that regional countries begin to align their military and economic interests with only one great power.