How many yards can a mobile phone scan during the epidemic?

During the epidemic, there is no fixed limit on the number of codes that a mobile phone can scan, depending on which code scanning software is installed on the mobile phone and whether these code scanning software supports scanning different types of codes. For example, if the code scanning software such as Alipay, WeChat and National Health Commission Health Code is installed on the mobile phone, you can scan different kinds of codes, such as payment code, health code and epidemiological investigation code.