韩国经济学家，在中国，用现金的都是外国人。

Group 1 - The core viewpoint of the article highlights that China has achieved a cashless society, which is unique globally, contrasting with Western countries where cash is still prevalent [1] - The financial research institute director mentioned that the perception of foreigners in China is based on their payment methods: those using cash are seen as foreigners, while those using mobile payments are considered Chinese [1] - The article suggests a cultural bias where Westerners may subconsciously reject Chinese innovations, despite China leading in certain technological advancements [1]