Xi'an City, known as Chang'an in ancient times, is located in northwest China's Shaanxi Province, bordering the Weihe River in the north and the Qinling Mountains in the south. At the beginning of the year, COVID-19 broke out suddenly. Like most cities across the country, a battle thus started to contain the epidemic in the ancient city. Nowadays, its economic and social operations are gradually returning to normal under containment measures. Chinese President #XiJinping paid a visit to Great Ta