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Air Touch is to visualize the particulate matter in the air so as to observe the color changes of the filter element in a more vivid and direct way. This idea breaks the norm and makes visualized filter element possible to the general public. Moreover, the filter element is presented in the form of blue sky with the background of traditional Chinese landscape paintings, which is more like a decoration rather than merely plain filter element. As the process of purifying the air goes on, the absorbed particulate matter will turn filter element grey and it looks like the previous beautiful landscape is fading away in dusky “sky”.