"Yuekang Code" is a health password developed in Guangdong Province based on the "Guangdong Province Easy" WeChat applet. Since February 2020, "Yuekang Code" has been promoted in 2 1 city of Guangdong Province, and applied in many key scenes such as airports, docks, railway and highway stations, hospitals, communities, industrial parks, offices and shopping malls. Help the masses "walk in Guangdong with one yard". People can get their own "Yuekang Code" simply by logging in to the "Guangdong Easy" WeChat applet on their mobile phones with their real names, without filling in health information. For groups such as the elderly and children who are inconvenient to use mobile phones, they can be collected by their families. The masses can prove whether they are the key population for epidemic prevention and control by showing the "Yuekang code", and there is no need to provide other health proof materials related to the epidemic. When people from other provinces enter Guangdong, they should apply in advance for the national integrated platform "epidemic prevention and health information code" or "Guangdong health code" as the pass certificate of our province to realize "one code pass"; Residents in the province can realize "one code communication" through "Yuekang code".
Mobile phones, called mobile phones or wireless phones, are usually called mobile phones. At first, they were just a communication tool. In the early days, it was also commonly known as "mobile phone". They are portable telephone terminals that can be widely used. They were originally developed from 1940 battlefield mobile phones manufactured by Bell Laboratories. 1958, Soviet engineer Leonid Kupriyan Norwich invented лк- 1 mobile phone, 1973, American Motorola engineer martin cooper invented the world's first commercial mobile phone. After the 2G era and 3G era, it has developed to the 4G era, followed by the 5G era, and the commercialization of 5G has appeared in China.