From the work "Blunt Sensibility" by Japanese author Junichi Watanabe, netizens commented that the essence of the book is in the title.
Dull feeling "is the opposite of" sensitive ", which can be understood as thick-skinned, calm, indifferent, belated, or replaced by the popular sense of relaxation.
This concept has been proposed for more than ten years. Nowadays, with the popularity of Buddhist style and lying flat mentality, it frequently appears in the social status of young people.