Beijing held 273rd novel coronavirus pneumonia epidemic prevention and control work press conference. At the press conference, Xu Hejian, spokesman of the Beijing municipal government, said that it was necessary to further strengthen the whole chain investigation of cold chain goods, find out the flow direction of epidemic related goods and seal them in time, tracing back to the end of the cold chain such as supermarkets and farmers' markets. We will improve the cold chain food management measures and severely punish illegal operations in accordance with the law.