China has withdrawn as the 2023 Asian Cup host due to the coronavirus, football officials said Saturday, with Beijing’s strict zero-Covid strategy dealing another blow to the country’s sporting ambitions. Authorities in China are pursuing a strategy of stamping out the virus entirely, which includes rapid lockdowns and mass testing, and millions in Shanghai have faced onerous restrictions for more than a month. But the measures – now rare globally, as most countries shift to living with Covid – have made hosting sporting events a major challenge. The Olympic-sized Asian Games, due to be staged…