Although Sun Wu ruled the south of the Yangtze River, the economic subject is still the Jiangnan giants. Sun Quan had no control over the southern gentry. Haozu has its own army, and father and son are descendants of each other. The main currency in local circulation of Sun Wu is five baht privately minted by Jiangnan giants. Most of the official currency minted by Sun Quan went to Shu Han and Cao Wei. Sun Wu's court minted money three times, with the intention of attacking opponents in the form of money.

The first time was in the seventh year of Jian 'an, and the money was transported to Cao Wei.

Sun Quan intends to use the advantages of a large number of copper mines in Jiangnan to cast money to defeat Cao Cao's monetary system. So, Sun Quan cast a "big spring fifty" weighing four grams, and stipulated that a big spring fifty was worth fifty baht.

The main purpose of daquan 50 is to be dragged to Cao Cao's territory by soldiers disguised as businessmen in exchange for food and other materials, trying to rob the enemy's wealth with 50 times the strength.

Unexpectedly, Cao Wei did not recognize this ratio, so he had to exchange it according to the ratio of 1 ratio 1. Cao Wei's people often come to Sun Wu's site to buy things after they get Daquan 50. Daquan 50 casting line was forced to stop production in less than a year. Sun Quan recycled and recast all fifty springs.

Sun Quan steals chickens and doesn't eat rice.

Some people say that Sun Quan should ban food and other materials from leaving the country. This is the key to the success of the currency war. However, because these trading rights are controlled by Jiangnan giants, Sun Quan can't do whatever he wants.

The second coinage was in the 24th year of Jian 'an (AD 2 19). After the Wu-Shu War, the money was transported to Shu Han. At that time, Guan Yu, who had just defeated Jingzhou, was sent by Sun Quan to Shu to exchange goods with 100 million pieces 150 baht. The quality of the money was better than that of Sichuan at that time, so it quickly became the main trading currency in Chengdu, which dealt a fatal blow to the rule of Shu Han. Zhuge Liang had to order that people should no longer use copper coins as a medium of exchange, and the Shu-Han transaction returned to the barter era. Shu Han lost almost all his wealth in this currency competition.

In 246, Sun Quan minted coins for the third time and transported them to Shu Han. After Zhuge Liang's death, the power of Shu Han fell into the hands of Jiang Wan.

At that time, Sun Wu and Shu Han formed a military alliance to deal with Cao Cao. Jiang Wan constantly sent soldiers disguised as businessmen, and took Sun Wu's money to Sun Wu's site to buy food and materials, which made some benefits. Later, Jiangnan giants, pier castles and even small farmers earned 150 baht to buy food in Han Shu. He also tried to use the money to buy local iron ore in Jiangnan, which aroused the resentment and resistance of the southern tycoons. In the end, we can only recast these big currencies. Sun Wu's monetary plan failed again.