Artist Yim Wai Wai graduated from The Chinese University of Hong Kong with a bachelor degree of Art; received a certificate of advanced ceramics from The Hong Kong Polytechnic University in 1991. She was a curator of the Hong Kong Museum of Art from 1985 to 1993. Afterwards, she has been dedicated to promoting art and continuing her creation, her artworks are the collection of the Hong Kong Museum of Art, the Hong Kong Heritage Museum and private collections. Her ceramics practices are best-known for shapes construction, especially forms like plants, human organs, which have become her signature. In the biological construction of shapes, the relationship between life and clay are demonstrated. Not only the daily life but also the emotion and belief of artist are directly projected to the artworks. When Wai Wai went to Taiwan for Artist in Residency, she fathomed the charisma of ceramics firewood, eventually created《21 grams》. By using clay and firewood to create the cross, also extract 21 gram of wood-ashes to be a part of the work, which symbolises the human soul. During the process of sentimental and rational observation with construction and transformation, the organic materials of ceramics correlate the motion of life like breathing.