Since the third year of Xianfeng in the Qing Dynasty (1853), the Qing Dynasty began to mint "when ten", "when fifty", "when hundred", "when thousand" in order to raise opium war reparations and suppress the military expenses of the Taiping army, resulting in a sharp drop in money prices and chaotic transactions.

As a result, foreign light money also took the opportunity to enter and flowed into our country one after another.

For example, North Korea's "Changpyeong Tongbao" money, Annam's "Gwangjung" money, "Jingsheng" money, etc., while the island country's "Kanyong Tongbao" money is even more popular.

According to the records, in the mid-nineties of the twentieth century, when the "Taylor's Expressway" was repaired, some copper coins of the Qing Dynasty were unearthed in the section from Fangxia to Yangzhuang, most of which were red copper coins of Qianlong, Jiaqing, Daoguang, Xianfeng and Guangxu years, among which there were a certain number of copper coins of the island country and Annan mixed in.

"History of the New Yuan", "Food and Goods Zhi VII" and "Banknote Law" have "...... to the 14th year of the Yuan Dynasty....... The merchant was sent to give gold to exchange copper coins, and he was allowed to do so".

After the island countries obtain copper from China through various channels, they manufacture light copper coins, and then export them to China in exchange for heavy copper coins, and then mint more light copper coins after being melted back to China, and then export them to China in exchange for more copper coins or copper materials, and so on, and so on, the wealth will gather more and more.

Therefore, the use of copper coins minted by the country to plunder our country economically is also a major initiative of the island country.

Hundreds of years later, when it launched a war of aggression against China, it directly adopted the bandit policy of "using war to feed war" that was taken from China and used in China.

According to the 54th volume of the "Shandong Provincial Chronicles": in 1899 (the 25th year of Guangxu in the Qing Dynasty), due to the high value of silver and copper, foreigners took the opportunity to buy a large number of Chinese money, and at the same time destroyed the Chinese currency system, they accumulated strategic materials (copper) for their own country, and the islanders were the first to bear the brunt.

After 1915, affected by the First World War, the price of copper as a strategic material skyrocketed, and the trend of destroying money and taking copper in China flourished.

In order to buy copper from China and transfer it to other countries for profit, the island people ignored several laws and hired Chinese people to buy, traffick, melt down and make copper nuggets in the interior of Shandong and then declare them for export.

In just two years, more than 60 million quintals were exported every year, worth 9 million taels of silver.

At that time, one-third of the copper bullied sold by the island countries to Russia was made in China, which directly led to the daily decline of the money system in the three provinces of Zhizhi, Shandong, and Henan.

Around 1920, when the warlords in various provinces in China were indiscriminately minting copper dollars, the price of money in Shandong was relatively high, while the price of silver was low, so the people of the island countries took the opportunity to steal and mint Chinese copper dollars, sold them to Chinese merchants at low prices, and distributed them to the mainland, which became one of the important reasons for the issuance of inflated copper dollars in various places.

At that time, Laiwu, Zhangqiu, Ningyang, Liaocheng and other thirteen counties circulated part of the copper yuan of "Forty Wen", which was the product of this background.

In August and September 1928, copper blocks of varying weights melted from copper yuan were shipped to the island country.

The Taishan Pill and Nikko Pill that are regularly sent to the island country are no less than three or four thousand pieces of copper each time, each weighing about seven or eight kilograms.

In 1935, the "legal tender" system was implemented in China, and the government recovered copper dollars within a time limit, and the islanders took the opportunity to buy a large number of copper dollars.

In the month alone, the "Jiao Customs" found the Tongyuan-3 car from the island steamer Huining Maru bound for Dalian.

During the year, the Japanese puppet regime wantonly looted copper products in the areas it occupied, and in addition to using merchants to openly buy them in the countryside, it also forcibly expropriated them on a household-by-household and per capita basis, and the copper dollars and money accumulated by the people were almost completely looted.