1. Cut with a knife.
2. Cut off metal materials with machine tool or burn off metal materials with flame and arc.
《 Writings of Prince Huainan · Qi's common saying 》"Therefore, the sage's property is just like a craftsman's chiseling and pegging, and a butcher's cutting and parting." Yan Zhitui, Northern Qi Dynasty《 Yan Family Instructions ·Morality: "Lu Xiang, the Wu Prefecture, was punished for his father's leisure, and Xiang lived a lifetime of clothes, vegetables, and rice. Although ginger and vegetables were cut, he could not bear to eat them, so he had to pinch and pick them for cooking at home." 《 Song Dynasty Book ·The Legend of Empress Concubine · Emperor Wen Shuyuan: "The words are used to find sorrow, and the feelings are like cutting." [1] 
