The silver futures contract of Shanghai Futures Exchange (revised) stipulates that the price limit is 3% of the settlement price of the previous trading day. Silver is a combination product of gold, both of which belong to precious metals, so silver basically follows the upward trend of gold every time. In recent years, the industrial demand of silver has greatly increased. Its advantages are low production cost, strong hedging ability and high investment value. However, silver futures also have risks and need to be cautious.