The cause of the epidemic. According to the official information of Henan Lankao epidemic prevention and control headquarters. On July 2, 2022, a case of COVID-19 epidemic was found in Baicheng Tiandi, Caolan Jianye. After discussion and decision by the epidemic prevention and control department of lankao county, the area was closed on July 3, 2022. As of August 2022 13, the website is still suspended. Lankao Jianye Baicheng Tiandi is a large-scale business center in Lankao, Henan Province.