Workers check bottles of disinfectant at a production workshop of a company in Harbin, northeast China's Heilongjiang, Jan. 31, 2020. In order to help combat the outbreak of pneumonia caused by the novel coronavirus, a number of companies in Heilongjiang that produce protective and disinfection products have recalled their employees to produce these products at full capacity, to ensure a stable supply for medical staff and citizens. (Photo by Zhang Tao/Xinhua)