The overall characteristics of Gan Long official kiln are: the point above the big characters is small in the middle, the four vertical lines are basically parallel, and the last stroke is slightly curved; The three water spots on the left side of the word "Qing" are written in the shape of "M"; The word "moon" on the lower right is mostly four long frames with a small vertical in the middle; The lower part of the word "dry" is a rigid "S" shape, and the upper mouth of the "S" is mostly to the right; The lower right part of the word "long" is symmetrical; There is generally a small gap at the top of the word "year"; There are three common ways to write the word "clothes".
The style of Gan Long kiln is mainly blue and white, with dark colors, red and enamel materials, gold, red, blue and sculpture. In a word, most of the styles of Qianlong Blue and White are neat in font and deep in blue and white, but there are some rare font deviations, Lian Bi writing and different shades of blue and white.