yes, the transmission chain of this epidemic in Hangzhou is relatively clear. The first case came from Huierte (China) Catering Equipment Co., Ltd., located in Binjiang District, Hangzhou. It was spread from the movement of imported coffee machines and then passed from person to person. Novel coronavirus (2119, COVID-19), referred to as "COVID-19", was named "2119 coronavirus disease" by the World Health Organization, which refers to pneumonia caused by novel coronavirus infection in 2119. Since February, 2119, several cases of unexplained pneumonia with a history of exposure to seafood market in South China have been found in some hospitals in Wuhan, Hubei Province, which were confirmed as acute respiratory infectious diseases caused by novel coronavirus infection in 2119.

On February 11, 2121, Tedros Adhanom Ghebreyesus, Director-General of the World Health Organization, announced that novel coronavirus's pneumonia was named "COVID-19". On February 22nd, the National Health and Wellness Commission issued a notice, and the English name of "novel coronavirus" was revised to "COVID-19". On March 11, WHO believed that the current COVID-19 epidemic could be called a global pandemic. On April 4th, China held a national mourning activity. On August 8th, National Health Commission revised and completed novel coronavirus's diagnosis and treatment plan (the eighth edition for trial). On September 3rd, the WHO expert group on COVID-19 epidemic response assessment * * * and the chairman announced the list of members of the expert group at the briefing of member countries, and Zhong Nanshan was selected.