To accurately identify the old flowerpot in Shiwan, we must first understand the ins and outs of Shiwan kiln. The address of Shiwan Kiln is in Shiwan Town, Foshan City, Guangdong Province. It is one of the most famous folk kilns in Ming and Qing Dynasties, and its main output is pottery and architectural ceramics. Among the many "works" of Shiwan kiln, blue, purple (rose purple) and green are the main ones, and the existing Shiwan old flowerpot is a small branch. When screening, we should first look at whether the whole flowerpot is "heavy" and whether the fetal bones are gray (or dark gray).

There is also a check to see if the bottom glaze and top glaze on the surface of the old flowerpot in Shiwan are very rich makeup. If the overall enamel is not uniform enough, or the traces of modern processing are too serious, it is likely to be a modern imitation. There is also to see whether the Hua Niaowen edge on the surface is "regular", because if it is genuine, the edge of Hua Niaowen will be irregular because it is a kiln-burned product, showing an irregular shape of liquid solidification, and vice versa, it is an imitation of modern industry. Then look at the treatment process at the bottom of the flowerpot and the water leakage in the middle of the flowerpot. Like the enamel on the surface of a flowerpot, if there are irregular firing marks instead of "regular" circles or carving marks processed by modern machines, the probability of authenticity is higher.