When did the epidemic in Cangzhou, Hebei Province begin?

The epidemic in Cangzhou, Hebei Province began in March, 2022. In Cangzhou, 89 cases of COVID-19 were diagnosed, and 82 asymptomatic infected people were counted, so timely prevention and control measures were taken. Cangzhou is a prefecture-level city under the jurisdiction of Hebei Province, located in the Heilonggang River Basin in the southeast of Hebei Province and the east of Hebei Plain.