Art derivatives are a combination of art and goods derived from artworks, with certainly added value in art. They include books signed and signed by the artist for limited collection and appreciation, and stationery printed with the artist's representative works. , Daily necessities, clothing and accessories, and collectible products combined with artistic elements. According to the above definitions, Which of the following are not art derivatives:. ['Collection of portrait paintings by famous painting master Qi Baishi.', 'C. D. , signed by the famous pianist Lang Lang.', 'The fountain pen used by Mr. Bingxin during his lifetime.', "Gold and silver commemorative coins with Xu Beihong's famous painting as a pattern."]