The official download for the latest Huawei SmartKit tool is available on the Huawei Enterprise Support Portal

The (formerly known as ServiceCD) is a unified service tool platform designed for the deployment, maintenance, and upgrading of Huawei’s enterprise IT products, including storage, servers, and cloud computing equipment. Where to Download the Latest Version

With the installed, here is a real-world scenario: Updating firmware on 20 S5720 switches.