Hangzhou multi-code fusion function is currently being piloted in the subway and Qiantang District, and will be promoted according to the pilot situation in the future. According to the relevant person in charge of the epidemic prevention and control headquarters in Hangzhou, since April 22nd, the display interface of Hangzhou's "health code" scanning code verification has indeed changed, and the "four codes and one screen" display has been realized. The new display page retains the original health code and vaccination information, and also adds nucleic acid detection information and verification information in key epidemic areas. Among them, in the two newly added codes, the nucleic acid detection information can not only display negative or positive information, but also display the time of the latest nucleic acid detection, and the verification information of key epidemic areas will display "Never been there" and "No results found".