A qingbai 'waves' pillow, Song dynasty 宋 青白釉水波紋枕

This type of pillows was regarded highly by the Qianlong Emperor, who even composed a poem on the beauty of Qingbai pillows. See a similar Northern Song dynasty 'waves' pillow in the Tapei Palace Museum, inscribed with this Imperial poem, illustrated in Obtaining Refined Enjoyment: The Qianlong Emperor's Taste in Ceramics, Taipei Palace Museum, Taipei, 2011, cat. no. 8. 

乾隆皇帝對青白水波紋瓷枕尤為鐘睞，甚至題詩美讚「金絲鋪荇藻，鐵足莭箛篍」。台北故宮博物院藏一北宋青白釉水波紋類例，器底刻此御製詩，詳見《得佳趣—乾隆皇帝的陶瓷品味》，台北故宮博物院，台北，2011年，編號8。