1. There are three main categories of cloud computing: private cloud, public cloud, and hybrid cloud; there are three main levels of cloud computing services: IAAS, PAAS, and SAAS. 2. The IaaS layer is the core and most basic part of the private cloud, and it is also the first part that enterprise IT cloudization should start with. Cloudification not only solves the self-service and automatic delivery of computing, storage and other resources, but also solves the problems of resource pool separation, complex maintenance, and inability to elastically expand caused by traditional architecture. 3. Hyper-convergence and private cloud are not substitutes. On the contrary, hyper-convergence products allow the IaaS layer to truly possess distributed architecture and software-defined attributes, thereby bringing about the integration of storage and computing resources, on-demand expansion and on-demand investment. "Cloud" features, and the converged deployment method further simplifies the IT infrastructure and reduces the total cost of ownership of the system. 4. Private cloud IaaS layer cloud transformation based on commercial hyper-converged products is becoming a mainstream solution. This solution has unique advantages in terms of reliability, scalability, openness, and ease of use.