The bodies samples and glazes samples of Jiaotanxia ancient Chinese Guan porcelain and those of Qingliangsi ancient Chinese Ru porcelain have some difference but can be compared with each other.

• 郊坛下窑官瓷的胎和釉与清凉寺窑汝瓷的胎和釉既有差异又有可比性。