It's easy to identify Qian Wen with ordinary appearance when playing with ancient coins, and it can basically be regarded as a fake. It is really difficult for novices to tell the truth from the false in the market. This paper introduces the basic points of distinguishing true from false, and the spread (wear) of age and historical traces from patina to color rust is called a handed down product. Due to the collection, the convex parts such as Qian Wen and Guo Qian are often smooth and copper-colored, and the rust layer in the concave parts is obvious and the color is heavy. There can be no rust layer or rust color on the new currency. Judging from the knocking and falling sound of coins, the old coins have lost their heat, but the sound of copper is too thick to produce an inflection point. Modern copper (crisp sound) is completely different from ancient copper (dull sound). You can find it by touching more ancient coins. In general, the intuitive method combined with literature research can basically meet the needs of judging authenticity. Authentic products are shown in the picture.