March 19.

On March 21, the Tangshan City New Coronavirus Epidemic Prevention and Control Leading Group Office issued an emergency notice stating that since March 19, multiple local confirmed cases of new coronavirus pneumonia have occurred in Tangshan City. Experts' preliminary traceability investigation found that most of the cases are suspected to be directly or indirectly related to cold chain food and its employees at the Shenghua Agricultural and Aquatic Products Wholesale Market in the High-tech Zone.

Do not go to public places or places where people gather during the epidemic. Wear a mask when going out, wash hands frequently, drink plenty of water, and pay attention to the balance between work and rest to improve the body's immunity.