(Bloomberg) -- China has questioned the “sincerity” of the Biden administration, as it pushes to resume high-level diplomatic talks with Beijing while also heaping tech sanctions on its main economic rival.Most Read from BloombergChina’s $23 Trillion Local Debt Mess Is About to Get WorseMexico Raises Alert Level on Volcano Rumbling Near CapitalMeta Fined Record €1.2 Billion in EU Over US Data TransfersMessi, Ronaldo Lead Saudi Arabia's Multibillion-Dollar Makeover“The US side asks for communicat