"China is undermining key elements of the international rules-based order," said Harris, who is on a four-day trip to Asia.
And we have witnessed disturbing behaviour in the East China Sea and in the South China Sea, and most recently, provocations across the Taiwan Strait."
Harris said U.S. forces would operate in the region "undaunted and unafraid" even as the United States expects "continued aggressive" actions by China.
U.S. Vice President Kamala Harris listens during a roundtable discussion at the NAACP National Convention in Atlantic City, New Jersey, U.S., July 18, 2022.
Aides said Harris would work on a unified approach in a region where leaders have warily watched rising tension between the United States and China.