This article assesses US-China relations during the COVID-19 pandemic. Prior to the pandemic, the US-China trade war created an atmosphere of bitterness and mistrust in bilateral relations and also prompted the Chinese leadership to seek to enhance its "discourse power" through "wolf warrior" diplomacy. This atmosphere hampered US-China communication and cooperation during the initial phase of the pandemic. The unleashing of "wolf warrior" diplomacy as the pandemic spread round the world, especially in the United States, has exacerbated US-China relations and served to accelerate the transition of US policy toward China from constructive engagement to strategic competition.