The base of the Jingde wood kiln is the Longquan kiln mouth. The famous kiln mouths of Jingdezhen Chai Kiln include: Chunfeng Xiangyu, Xiaoya, Jiuduan Yao, Ningfeng Kiln, and Fangjiashan Chai Kiln. Among them, Chunfeng Xiangyu is the most expensive, and the bottom model of Jingdezhen Chai Kiln is the Longquan kiln mouth. Jingdezhen Chai Kiln, signed as the official kiln for firing porcelain by the Zhou emperors in the Five Dynasties and Ten Kingdoms. According to records, the Chai Kiln was founded in Zhengzhou, Henan Province in the early years of Zhou Xiande's reign in the Five Dynasties, and the kiln mouth was named after Chai Rong, the surname of Zhou Shizong. It is one of the oldest kilns in history. The famous imperial kiln is the only porcelain kiln in China's history named after the surname of a monarch.