In the collection of ancient coins, what are the meanings of Xingyue, Guangan and Tiemu?

Wide wear: the inner hole of a coin is larger than that of other similar banks.

Japanese: refers to the raised circle on the back of money. ?

Moon: refers to the convex arc on the surface or back of a coin. Call the moon up, call the moon down. ?

Astrologer: refers to a raised dot on the front or back of a coin. ?

Pregnant star: refers to the moon rising on the back of money. ?

Bare back: refers to the money backlight without words. ?

Qian Fan: There are various models for casting coins, including clay model, copper model and iron model. ?

Money samples: Money samples hand-carved from ivory, jade, wood and other materials, which are specially decided by the emperor or the higher authorities. The Chinese History Museum has a "Xianfeng Heavy Treasure" Baohe Bureau as a sample of 50 jujube carvings. ?

Sculpting mother: also known as Zuqian. A coin model carved by hand with copper, tin and other materials. Qian Wen is vigorous, rich, exquisite and extraordinary, and rarely exists in the world. Perforations are mostly small round holes, commonly known as "golden mouths are not opened". The earliest existing bronze carved money mothers are Xuanhe Tongbao's cursive carved money mother in the National Treasure Temple Coin Museum and Qian Qian's carved mother in Jiajing Bao Tong in the Ming Dynasty in Nanjing Museum. ?

Mother money: it is directly cast by the carved mother as a casting model. Qian Wen is slender, delicate and thick, which is rare in the world. ?

Iron Mother: The mother money used to turn cast iron money is copper itself. More refined and heavier than iron money. ?

Iron model copper: copper coins cast with cast iron coins. Generally, it belongs to trial casting, and the casting quantity is not much. ?

Sample money: the sample money for trial casting and initial casting, as the standard of casting money or for the boss to check.