在微信小程序登录过程中获取微信用户信息时，需要进行多个有关联的异步请求操作，获取用户加密信息，然后对其解密并返回。传统的异步回调嵌套方法造成程序可读性差，程序执行性能低下。而Promise的出现，解决了微信小程序获取微信用户信息时多个异步操作请求问题，对异步请求功能划分更明确，大大提高了程序的可读性，并提供了良好的错误处理逻辑。

In the process of getting Wechat user information in the login process of Wechat applet, it is necessary to carry out a num-ber of related asynchronous request operations to obtain the user's encrypted information, and then decrypt and return it. The tradi-tional nested method of asynchronous callback results in poor program readability and low program execution performance. Theemergence of Promise solves the problem of multiple asynchronous operation requests when Wechat applet obtains Wechat user in-formation. It divides the asynchronous request function more clearly, greatly improves the readability of the program, and providesgood error handling logic.