What is the official kiln in ancient books?

The official kiln in the Southern Song Dynasty is an official kiln for firing porcelain. During the Southern Song Dynasty, the working people of the Han nationality made many innovations and progress in porcelain-making technology. When Lin 'an (now Hangzhou) was the capital of the Southern Song Dynasty, it was established to repair the inner division and the kiln under the suburban altar and produce the imperial vessels dedicated to the court, so it was called the Southern Song Dynasty official kiln.

The official kiln is divided into two places, one is the Bianjing official kiln in the Northern Song Dynasty, and the other is the new kiln Hangzhou Xiuneisi official kiln [,also known as the inner kiln, which was established by Gaozong in Hangzhou after the Southern Song Dynasty moved south. However, there are still different opinions on this classification, because Bianjing site is buried under Kaifeng city, and archaeology is difficult to dig, so we can only infer the kiln burning situation at that time by ancient books. According to several ancient books, such as On Gegu written by Cao Zhao in the early Ming Dynasty, Miscellaneous Records of Negative Mystery written by Southern Song Dynasty, and Bi Heng in Yuan Zhai written by Southern Song Dynasty, the official kiln is really divided into two parts.