The kiln mountain kiln location of bowl is in the col kiln mountain in the south of the bowl of Ao village of precious jade of the north of the Northeast of Leqing, found in 1983. Area is about 1000 square meters, there is 3 meters wide one inside, long concave concave ditch of 40 meters, in order that the trace collapses under the kiln bed. The products mainly have bowl, one, pot, jar, candlestick,etc., it is mainly bowl, throw mouths, hold back the mouth, turn over three kinds of mouths, enclose the foot inboard and outboard sides and fasten and make the trace. The color of glaze relies mainly on bluish white, thin and uniform, have light of obviously floating. The color of fetus is ashen, fine and smooth and dense. Some products construct blue and green yellow, steel gray color glaze, the fetus is gray, careless, construct and is inferior to the bottom outside glazes, the inner bottom leaves an astringent circle. Generally adopt and delineate flowers ornamentally, the line is decorated with combs and comb line, folding fan line, lotus a line, creeping weed line, thin, floating clouds line,etc.. The kiln has a protruding bottom casket earthen bowl, flaring base with a tight waist, washer,etc.. Firing time is two Song.