Mei Cheng also studied and determined how the Kartman heat card reflects "warmth". Because the "Japanese heating fiber" put forward by Kaman International does not conform to consumers' inherent cognition of "keeping warm" and needs a lot of complicated explanations and education, the hype of "Japanese heating fiber" does not conform to the positioning of "fashion underwear"; Australian wool is a concept of warmth easily accepted by consumers, which accords with consumers' inherent cognition of warmth. Therefore, Mei Cheng denied the practice of mainly promoting "Japanese heating fiber", and thought that through the information mention of "Australian wool", consumers could know that Kartman thermal card is thermal underwear.