8 Already Rare Books on Tea, Teacups, Yixing & Teapots: China Guardian, "300 Years of Fine Yixing" November 2009 & "Fine Porcelain Teacups" November 2014; Beijing Dongxheng "Tea Teapots & Sets" May 2015 & "Antique Yixing Stoneware" May 2015 & "Gu Jingzhou 100 Anniversary" May 2015; Tokyu Chuo Auction "Art of Chinese Tea Ceremony" September 2015 & "Art of the Tea Ceremony" November 2015; Nagel Auction Germany, "Chinese Yixing Teapots" June 2015. Good condition.