If it is impossible for two mobile phones to log in to an account at the same time, and one mobile phone logs in to another mobile phone and then logs in to the same account, the top one will be offline and only multiple accounts can be switched back and forth. A micro-signal can only log in the health code of one place. If two people need it, you can use one on WeChat and one on Alipay, which can meet your health code needs.
A mobile phone can download two WeChat softwares, one is WeChat APP, and the other is Double Assistant Software. After the installation is completed, you can open the other party's WeChat. After the software is installed, you can log in and use it separately, and then apply for registration and binding in Password Application, and the health password can be bound as required.