To the present day scholars have agreed that of the late-Southern Song period official kilns only the Jiaotanxia kiln remains,but the author\'s study of the documentation of the Southern Song period shows that in both the early and late periods of the Southern Song there were two official kilns-the Xiuneisi official kiln and the Jiaotanxia official kiln.

This article,analyzing the sources of capital of kiln yards,the sources and identities of administrative officials and the directions of flow of the products,proves that official kilns and imperial kilns are different concepts in terms of connotation and denotation.

the exact decline time of porcelain production in official kilns and the producing conditions in the middle period of Qing dynasty.

The large vessels from official kilns of the Ming-Qing period in the collection of the Palace Museum in Beijing are very large yet finely wrought and they are the finest examples in the world in terms of type and workmanship.

Guan Kiln of Early Ming dynasty reaches the summit in the history of Chinese ceramics,and the research of it remains one of the most difficult problems.