The end time of the first wave of the epidemic in Xi'an is on January 13, 2023.On December 28, 2020, big data showed that the infection rate in Xi'an was at 53.89%, and the number of infected people on that day was 242,100, and the number of new people was showing a decreasing trend, so it is estimated that the end time of the first wave of the epidemic is on January 13th.