1. London silver, also known as international spot silver, is a contract transaction based on the principle of capital leverage. Different from what we usually say, it requires the delivery procedures to be completed within 1 ~ 2 working days after the transaction is completed, but some investors do not actually deliver silver after the transaction is completed, but just close their positions at maturity to earn the difference profit.

2. Silver futures refer to futures contracts with the silver price as the subject matter at a certain point in the future. Silver futures contracts are standardized futures contracts, which are formulated by the corresponding futures exchanges. The detailed silver specifications, silver quality and delivery date are clearly stipulated above.

1. Silver is a simple metal with the symbol of Ag, which has ductility and good thermal and electrical conductivity. Silver, namely silver, is called silver because of its white color, as opposed to gold. Think of it as money and decorations. In ancient times, money was called silver. Pure silver is white in color, metallic in luster with impurities, soft in quality, hardened with impurities, and grayish red in color. Pure silver has a specific gravity of 10.5, a melting point of 960.5℃, good conductivity, and is soluble in nitric acid and sulfuric acid. Silver is one of the metals found in ancient times. Although silver also exists in the form of simple substance in nature, most of it exists in the form of combined state. Silver has high ductility, so it can be rolled into a transparent foil with a thickness of only 0.3 microns, and silver particles with a weight of 1 g can be drawn into filaments about two kilometers long. The thermal conductivity and electrical conductivity of silver are among the best among metals.

2. Pure silver is white, metallic and soft. The melting point is 96 1.93℃, the boiling point is 22 12℃, and the density is10.5g/cm3 (20℃). Silver is soft, flexible and malleable, second only to gold. It can be pressed into sheets and drawn into filaments. Soluble in nitric acid and sulfuric acid. The reflectivity of silver to light reaches 9 1%. At room temperature, halogen can slowly combine with silver to form silver halide. Silver does not react with dilute hydrochloric acid, dilute sulfuric acid and alkali, but can react with strong oxidizing acid concentrated nitric acid and concentrated hydrochloric acid. The main uses of silver are mainly based on three pillars: industry, photography and jewelry and silverware. The total demand of these three types of silver accounts for about 85% of the demand for silver.

Since ancient times, silver and gold have been regarded as a symbol of wealth together. The chemical symbol of silver is Ag, which comes from the Latin Argertum, meaning "light and brightness". Because silver is white, it is called "silver". Silver not only has good electrothermal conductivity, but also has high photosensitivity and luminous characteristics, and is used in industry, photography, jewelry, currency manufacturing and so on. Compared with gold, silver was used for coinage more and earlier and entered the circulation field because of its large supply and low value. Many countries have established the silver standard, with silver coins as the mainstream currency.