China says all aircraft must notify Chinese authorities before entering the zone, which includes islands controlled by Japan but claimed by Beijing. The United States is not acknowledging the zone and flew two B-52 through unhindered Wednesday.
Senior administration officials providing information on the grounds their names not be used said Biden intends to press Beijing policymakers on the "unsettling" pattern of how they deal with neighbors.
The officials said Biden will make it clear the U.S. has a "rock-solid commitment" to its allies in the region. Biden plans to visit allies Japan and South Korea during the visit from Dec. 1-8.
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