The price difference between Shanghai nickel and Lun nickel is not the main difference, and the tariff is 13%. According to relevant public information, the price difference between Shanghai Nickel and Lun Nickel includes not only tariffs, but also factors such as currency exchange rate, delivery date, supply and demand. Shanghai Nickel refers to the nickel futures contract traded on the Shanghai Futures Exchange, also known as the main nickel contract, and Lun Nickel refers to the nickel contract traded on the London Metal Exchange.