Tang XiaoZheng is a foldable steam appliance which occupies little space on the cooking bench. When the steam appliance is folded vertically to go into storage status, it occupies little space on the cooking bench in the kitchen. One can use it simply by unfolding the folded parts, placing food in it, covering the lid and choosing the time. With 2 transparent layers, the design makes it convenient for the user to choose one or two layers when cooking food. When less food is to be cooked, a single layer is sufficient. The lid can be folded reversely, which saves space. The user can add water any time during the cooking process. As a flexible steam appliance, it is suitable for a narrow space.