Shallow carving on mahogany is a carving technique that extends the shallow carving technique in bamboo carving to mahogany materials. Shallow carving on mahogany first appeared in the late Ming Dynasty. Zhang Xihuang, Zhang Jiru, Xu Subai, Xu Xiaomu, Shen Juechu and Gao Yinfu from Changzhou were the representative figures at that time. In modern times, Xu Subai, Xu Bingyan and Xu Feng (Xu Feng) have inherited the tradition for three generations, delving into shallow carving. They are proficient in carving bamboo and mahogany. They have profound attainments in expressing the brush and ink connotation of Chinese painting on shallow carving on mahogany, which has led to the development of shallow carving on mahogany in Changzhou. Shallow carving technique, also known as negative carving, is different from predecessors and others in the use of knife techniques. Shallow carving usually removes the bamboo green and carves on the delicate bamboo muscle, which is loved and respected by literati and calligraphers and painters. However, due to the low contrast of the knife marks on the bamboo muscle, it needs to be seen sideways in the light, which is not easy for ordinary people to accept. In addition, due to material limitations, large paintings cannot be carved. Therefore, in their exploration and practice, the predecessors used knives as pens and mahogany as paper, changing the material from bamboo to mahogany, and found that it has a more intuitive effect than shallow carving on bamboo skin, and the painting has a larger room for expansion, and the shape is not limited by arcs and circles. Different knife techniques can be used on mahogany boards to express different brushwork in ink painting, reproducing a series of freehand ink paintings with smooth brushstrokes, thick and thin, dry and wet. The older the mahogany shallow carving works are, the better the artistic effect is, because the color of the mahogany knife carvings becomes more elegant, more unified, and more integrated with time. In recent years, the descendants of Changzhou mahogany shallow carving have continuously increased their efforts to protect and inherit through various forms, and have achieved gratifying results. In 2003, Xu Bingyan and Xu Feng exhibited their mahogany shallow carvings at the "China-France Cultural Year Paris Art Exhibition"; in 2005, Xu Bingyan exhibited his mahogany shallow carvings at the "World Expo" held in Aichi Prefecture, Japan, allowing the world to appreciate the artistic charm of Chinese bamboo and wood carvings, and made outstanding contributions to the export of Chinese mahogany shallow carvings abroad. Xu Bingyan was also awarded the title of Chinese Folk Arts and Crafts Artist by UNESCO and the China Folk Artists Association. In 2004, Xu Feng participated in the engraving of the large-scale mahogany shallow carving "Pine and Cypress", which is now on display in the conference hall of Changzhou Municipal Government. In 2009, the "Ren Bonian Figure" co-created by Xu Bingyan and Xu Feng won the "Tiangong Art Garden Baihua Cup" gold medal. In 2014, the Xu's Bamboo and Wood Carving Museum in Wujin District, Changzhou City was approved by the Jiangsu Provincial Cultural Relics Bureau as a provincial-level private museum, becoming the first private museum in the province with bamboo and wood carving as its artistic feature. So far, it has received more than 10,000 visitors. At present, Xu Feng has also brought the rosewood shallow carving project into colleges and universities, opened intangible cultural heritage studios at Changzhou Engineering College and Changzhou Preschool Normal University, and specially opened a professional course on the practice of rosewood shallow carving skills at Changzhou Textile Institute.