Antique art collection has a jargon: open the door. The so-called open door is a comprehensive recognition of an item. First of all, this item should be beautiful. Porcelain appraisal is more so. Sketchy workmanship, rough painting, even if the original, (non-imitation) can not reach the hall of elegance. Porcelain appraisal is as follows: 1: age identification, more complex, mainly to see the degree of reflection on the surface of the porcelain, the color of the carcass, the appearance of the shape, composition ideas, tire and glaze composition, etc., to determine the base of the approximate age. 2: the integrity of the appraisal, to see if there is cracked, unglazed, bumped, patched, scratched, etc. 3: the artistic value of the appraisal: whether or not the celebrity manufacturing, whether or not the celebrity writing, painting, etc., 4: the historical Value identification: such as whether the official kiln, whether the celebrity supplies, whether there is a special historical significance, etc. 4: material identification: such as whether the special fine clay, tire glaze, etc. 5: Scarcity: the scarcity of fine porcelain is more valuable.