What is the infected strain of this epidemic in Xuzhou?

Omicron BA52 mutant. The infected strain of this wave of epidemic in Xuzhou is Omicron BA52 mutant, which spreads quickly and has strong concealment. Xuzhou, called Xu for short, was called Pengcheng in ancient times. It is a prefecture-level city and sub-central city in Jiangsu Province, a national historical and cultural city approved by the State Council, a national comprehensive transportation hub and a central city of Huaihai Economic Zone.