蘇富比於3月紐約亞洲藝術週將拍賣一件南宋建窯兔毫,「中國瓷器」大亨翟健民給出90分——何以保留10分? Sotheby's will be selling a Jian 'nogime' bowl in its Asian Art Week in March. The prominent expert in Chinese porcelains, William Chak, considers the lot 90% perfect only. What holds him back from credit