The word "angular" comes from Ji Liuqi of the Qing Dynasty's "The Northern Strategy of the Ming Dynasty·Zheng Xuan Benmo": "In the court and in the country, the years are uneven, the edges and corners are not too exposed." It describes a person's personality that is relatively hard and sharp.
Purpose: Focusing on the social experience of retired military officers, from a simple military camp to a complex social transformation.