First of all, the price is 54 times higher, indicating that the price of gold has risen too much and the price of silver has stagnated; In other words, the price of silver has fallen sharply, and the price of gold has fallen to a limited extent.

Assuming that the market price will tend to be reasonable, the price ratio will decrease.

This requires that in the future, the price of gold will increase less than that of silver, or the price of gold will decrease more than that of silver.

Then the operation is to sell Shanghai gold and buy Shanghai silver.

Because the contrast is 54, gold is 1 kg and silver is 15 kg.

Arbitrage requires buyers and sellers to be equal, and the price of gold/silver =54. Suppose x is the price of silver, y is the price of gold, the number of hands of Shanghai gold is m, and Shanghai silver is n.

There is a formula: x *15 *1000 * m = y *1000 * n, and N/M=3.6 can be calculated.