After signing, paying and authorizing with Calculus, a product demonstration and sales terminal will be set up in the residential area of the contracting party to fully showcase the product performance advantages of Calculus, allowing consumers to experience and compare them firsthand, thereby achieving the purpose of promoting sales and brand promotion for David Yang's products.

Experiential kitchen operators establish experiential kitchens in their residential areas to promote and sell David Yang's AI smoke purifier and related products, allowing consumers to truly experience the performance of David Yang's products, which can completely remove cooking fumes, prevent backflow, require no dismantling or washing, and emit no pollution. This approach achieves true green, healthy, and environmentally-friendly benefits, and completely eliminates the harm and trouble caused by traditional range hoods to household kitchens.

Benefitting the neighbors, experiential kitchen operators can also receive corresponding rewards, reducing the exploitation in the sales process and truly benefiting the people. At the same time, experiential kitchen operators become beneficiaries themselves. During the experiential process, consumers can truly feel the fundamental difference between David Yang's AI smoke purifier and traditional range hoods, as well as the benefits that David Yang's products bring during use.