The 21 st China International Agrochemical and Crop Protection Exhibition (CAC 2020), originally scheduled to be held on 24-26 February, 2020 in Shanghai New International Expo Centre, has been postponed due to the spread of the novel Coronavirus (2019-nCoV) in China. Chinese government has initiated the first-level response mechanism for major public health emergencies, and abolished all types of large-scale public activities. The new date will be announced as soon as it is determined.