He is very familiar with the subject

"There are a lot of productses in head ditch in the door to be all more abundant.In addition to coal, the stone here anticipates, the azure stone is also all very famous.Especially balmain azure stone, built the time of imperial palace those early years Manchu Dynasty, the glazed tileses of head ditch in the door were all royal,appointed product,."As a native person from head ditch in door, the Xiao is always prosperous to calculate up is an expert of azure stone.What color, what specification of tile use which situation, he is very familiar with the subject, "but we are in a lot of villages this time and discovered to use the azure stone does of greatly copy buildings, such as wall wall, gate tower and ornamental archway...etc..These those early years the azure stone that allow the princes and dukes nobility use of house, after the liberation our common people by himself/herself finally can also use last."