The implementation of the three-day, two-screening requirement by the time point, and cancel the airplane trip. Epidemic prevention and control SMS is based on the results of the big data screening, sent risk alert information. The next day to do the plane, received the epidemic prevention and control of big data SMS according to the time node to implement the three-day two inspection requirements, and cancel the plane trip. Aircraft (aeroplane, airplane) is a heavier-than-air aircraft with one or more engines power plant to generate forward thrust or pull, by the fixed wings of the fuselage to generate lift, flying in the atmosphere.